Improve gist XLOG code to follow the coding rules needed to prevent
torn-page problems. This introduces some issues of its own, mainly that there are now some critical sections of unreasonably broad scope, but it's a step forward anyway. Further cleanup will require some code refactoring that I'd prefer to get Oleg and Teodor involved in.
This commit is contained in:
Tom Lane
parent
4243f2387a
commit
89395bfa6f
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@ -8,7 +8,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.129 2006/03/05 15:58:20 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.130 2006/03/30 23:03:09 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -90,6 +90,7 @@ gistbuild(PG_FUNCTION_ARGS)
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double reltuples;
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GISTBuildState buildstate;
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Buffer buffer;
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Page page;
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/*
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* We expect to be called exactly once for any index relation. If that's
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@ -104,33 +105,33 @@ gistbuild(PG_FUNCTION_ARGS)
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/* initialize the root page */
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buffer = gistNewBuffer(index);
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Assert(BufferGetBlockNumber(buffer) == GIST_ROOT_BLKNO);
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page = BufferGetPage(buffer);
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START_CRIT_SECTION();
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GISTInitBuffer(buffer, F_LEAF);
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if (!index->rd_istemp)
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{
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XLogRecPtr recptr;
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XLogRecData rdata;
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Page page;
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rdata.buffer = InvalidBuffer;
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rdata.data = (char *) &(index->rd_node);
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rdata.len = sizeof(RelFileNode);
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rdata.buffer = InvalidBuffer;
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rdata.next = NULL;
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page = BufferGetPage(buffer);
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START_CRIT_SECTION();
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_CREATE_INDEX, &rdata);
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PageSetLSN(page, recptr);
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PageSetTLI(page, ThisTimeLineID);
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END_CRIT_SECTION();
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}
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else
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PageSetLSN(BufferGetPage(buffer), XLogRecPtrForTemp);
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PageSetLSN(page, XLogRecPtrForTemp);
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LockBuffer(buffer, GIST_UNLOCK);
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WriteBuffer(buffer);
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END_CRIT_SECTION();
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/* build the index */
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buildstate.numindexattrs = indexInfo->ii_NumIndexAttrs;
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buildstate.indtuples = 0;
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@ -305,6 +306,15 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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bool is_splitted = false;
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bool is_leaf = (GistPageIsLeaf(state->stack->page)) ? true : false;
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/*
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* XXX this code really ought to work by locking, but not modifying,
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* all the buffers it needs; then starting a critical section; then
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* modifying the buffers in an already-determined way and writing an
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* XLOG record to reflect that. Since it doesn't, we've got to put
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* a critical section around the entire process, which is horrible
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* from a robustness point of view.
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*/
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START_CRIT_SECTION();
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if (!is_leaf)
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@ -312,6 +322,11 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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* This node's key has been modified, either because a child split
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* occurred or because we needed to adjust our key for an insert in a
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* child node. Therefore, remove the old version of this node's key.
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*
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* Note: for WAL replay, in the non-split case we handle this by
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* setting up a one-element todelete array; in the split case, it's
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* handled implicitly because the tuple vector passed to gistSplit
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* won't include this tuple.
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*/
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PageIndexTupleDelete(state->stack->page, state->stack->childoffnum);
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@ -336,9 +351,7 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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XLogRecData *rdata;
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rdata = formSplitRdata(state->r->rd_node, state->stack->blkno,
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&(state->key), dist);
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START_CRIT_SECTION();
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is_leaf, &(state->key), dist);
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_SPLIT, rdata);
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ptr = dist;
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@ -348,8 +361,6 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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PageSetTLI(BufferGetPage(ptr->buffer), ThisTimeLineID);
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ptr = ptr->next;
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}
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END_CRIT_SECTION();
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}
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else
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{
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@ -410,7 +421,6 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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else
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ourpage = dist;
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/* now gets all needed data, and sets nsn's */
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page = (Page) BufferGetPage(ourpage->buffer);
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opaque = GistPageGetOpaque(page);
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@ -437,8 +447,11 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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WriteBuffer(ptr->buffer);
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ptr = ptr->next;
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}
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WriteNoReleaseBuffer(state->stack->buffer);
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}
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WriteNoReleaseBuffer(state->stack->buffer);
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END_CRIT_SECTION();
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}
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else
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{
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@ -451,7 +464,7 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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if (!state->r->rd_istemp)
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{
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OffsetNumber noffs = 0,
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offs[MAXALIGN(sizeof(OffsetNumber)) / sizeof(OffsetNumber)];
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offs[1];
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XLogRecPtr recptr;
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XLogRecData *rdata;
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@ -462,17 +475,14 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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noffs = 1;
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}
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rdata = formUpdateRdata(state->r->rd_node, state->stack->blkno,
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offs, noffs, false, state->itup, state->ituplen,
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rdata = formUpdateRdata(state->r->rd_node, state->stack->buffer,
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offs, noffs, false,
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state->itup, state->ituplen,
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&(state->key));
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START_CRIT_SECTION();
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_ENTRY_UPDATE, rdata);
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_UPDATE, rdata);
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PageSetLSN(state->stack->page, recptr);
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PageSetTLI(state->stack->page, ThisTimeLineID);
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END_CRIT_SECTION();
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}
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else
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PageSetLSN(state->stack->page, XLogRecPtrForTemp);
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@ -481,6 +491,8 @@ gistplacetopage(GISTInsertState *state, GISTSTATE *giststate)
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state->needInsertComplete = false;
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WriteNoReleaseBuffer(state->stack->buffer);
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END_CRIT_SECTION();
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if (!is_leaf) /* small optimization: inform scan ablout
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* deleting... */
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gistadjscans(state->r, GISTOP_DEL, state->stack->blkno,
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@ -636,30 +648,14 @@ gistfindleaf(GISTInsertState *state, GISTSTATE *giststate)
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}
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/*
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* Should have the same interface as XLogReadBuffer
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*/
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static Buffer
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gistReadAndLockBuffer(Relation r, BlockNumber blkno)
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{
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Buffer buffer = ReadBuffer(r, blkno);
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LockBuffer(buffer, GIST_SHARE);
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return buffer;
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}
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/*
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* Traverse the tree to find path from root page.
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* Traverse the tree to find path from root page to specified "child" block.
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*
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* returns from the begining of closest parent;
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*
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* Function is used in both regular and recovery mode, so must work with
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* different read functions (gistReadAndLockBuffer and XLogReadBuffer)
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*
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* To prevent deadlocks, this should lock only one page simultaneously.
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*/
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GISTInsertStack *
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gistFindPath(Relation r, BlockNumber child,
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Buffer (*myReadBuffer) (Relation, BlockNumber))
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gistFindPath(Relation r, BlockNumber child)
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{
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Page page;
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Buffer buffer;
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@ -677,7 +673,8 @@ gistFindPath(Relation r, BlockNumber child,
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while (top && top->blkno != child)
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{
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buffer = myReadBuffer(r, top->blkno); /* locks buffer */
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buffer = ReadBuffer(r, top->blkno);
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LockBuffer(buffer, GIST_SHARE);
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gistcheckpage(r, buffer);
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page = (Page) BufferGetPage(buffer);
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@ -833,7 +830,7 @@ gistFindCorrectParent(Relation r, GISTInsertStack *child)
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}
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/* ok, find new path */
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ptr = parent = gistFindPath(r, child->blkno, gistReadAndLockBuffer);
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ptr = parent = gistFindPath(r, child->blkno);
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Assert(ptr != NULL);
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/* read all buffers as expected by caller */
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@ -1192,27 +1189,31 @@ gistnewroot(Relation r, Buffer buffer, IndexTuple *itup, int len, ItemPointer ke
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Assert(BufferGetBlockNumber(buffer) == GIST_ROOT_BLKNO);
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page = BufferGetPage(buffer);
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GISTInitBuffer(buffer, 0);
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START_CRIT_SECTION();
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GISTInitBuffer(buffer, 0); /* XXX not F_LEAF? */
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gistfillbuffer(r, page, itup, len, FirstOffsetNumber);
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if (!r->rd_istemp)
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{
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XLogRecPtr recptr;
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XLogRecData *rdata;
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rdata = formUpdateRdata(r->rd_node, GIST_ROOT_BLKNO,
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NULL, 0, false, itup, len, key);
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START_CRIT_SECTION();
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rdata = formUpdateRdata(r->rd_node, buffer,
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NULL, 0, false,
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itup, len, key);
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_NEW_ROOT, rdata);
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PageSetLSN(page, recptr);
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PageSetTLI(page, ThisTimeLineID);
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END_CRIT_SECTION();
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}
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else
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PageSetLSN(page, XLogRecPtrForTemp);
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WriteNoReleaseBuffer(buffer);
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END_CRIT_SECTION();
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}
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void
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@ -8,7 +8,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.16 2006/03/05 15:58:20 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.17 2006/03/30 23:03:10 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -80,6 +80,12 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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page = (Page) BufferGetPage(buffer);
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maxoff = PageGetMaxOffsetNumber(page);
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/*
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* XXX need to reduce scope of changes to page so we can make this
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* critical section less extensive
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*/
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START_CRIT_SECTION();
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if (GistPageIsLeaf(page))
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{
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if (GistTuplesDeleted(page))
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@ -188,11 +194,9 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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ItemPointerSet(&key, blkno, TUPLE_IS_VALID);
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rdata = formSplitRdata(gv->index->rd_node, blkno,
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&key, dist);
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false, &key, dist);
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xlinfo = rdata->data;
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START_CRIT_SECTION();
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_SPLIT, rdata);
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ptr = dist;
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while (ptr)
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@ -202,7 +206,6 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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ptr = ptr->next;
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}
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END_CRIT_SECTION();
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pfree(xlinfo);
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pfree(rdata);
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}
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@ -235,8 +238,6 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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oldCtx = MemoryContextSwitchTo(gv->opCtx);
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gistnewroot(gv->index, buffer, res.itup, res.ituplen, &key);
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MemoryContextSwitchTo(oldCtx);
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WriteNoReleaseBuffer(buffer);
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}
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needwrite = false;
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@ -302,15 +303,14 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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XLogRecPtr recptr;
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char *xlinfo;
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rdata = formUpdateRdata(gv->index->rd_node, blkno, todelete, ntodelete,
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res.emptypage, addon, curlenaddon, NULL);
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rdata = formUpdateRdata(gv->index->rd_node, buffer,
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todelete, ntodelete, res.emptypage,
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addon, curlenaddon, NULL);
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xlinfo = rdata->data;
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START_CRIT_SECTION();
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_ENTRY_UPDATE, rdata);
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_UPDATE, rdata);
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PageSetLSN(page, recptr);
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PageSetTLI(page, ThisTimeLineID);
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END_CRIT_SECTION();
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pfree(xlinfo);
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pfree(rdata);
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@ -322,6 +322,8 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
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else
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ReleaseBuffer(buffer);
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END_CRIT_SECTION();
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if (ncompleted && !gv->index->rd_istemp)
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gistxlogInsertCompletion(gv->index->rd_node, completed, ncompleted);
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@ -579,6 +581,17 @@ gistbulkdelete(PG_FUNCTION_ARGS)
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*/
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pushStackIfSplited(page, stack);
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/*
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* Remove deletable tuples from page
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*
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* XXX try to make this critical section shorter. Could do it
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* by separating the callback loop from the actual tuple deletion,
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* but that would affect the definition of the todelete[] array
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* passed into the WAL record (because the indexes would all be
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* pre-deletion).
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*/
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START_CRIT_SECTION();
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maxoff = PageGetMaxOffsetNumber(page);
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for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
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@ -608,17 +621,17 @@ gistbulkdelete(PG_FUNCTION_ARGS)
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{
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XLogRecData *rdata;
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XLogRecPtr recptr;
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gistxlogEntryUpdate *xlinfo;
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gistxlogPageUpdate *xlinfo;
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rdata = formUpdateRdata(rel->rd_node, stack->blkno, todelete, ntodelete,
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false, NULL, 0, NULL);
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xlinfo = (gistxlogEntryUpdate *) rdata->data;
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rdata = formUpdateRdata(rel->rd_node, buffer,
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todelete, ntodelete, false,
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NULL, 0,
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NULL);
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xlinfo = (gistxlogPageUpdate *) rdata->data;
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START_CRIT_SECTION();
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_ENTRY_UPDATE, rdata);
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recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_UPDATE, rdata);
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PageSetLSN(page, recptr);
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PageSetTLI(page, ThisTimeLineID);
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END_CRIT_SECTION();
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pfree(xlinfo);
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pfree(rdata);
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|
|
@ -627,6 +640,8 @@ gistbulkdelete(PG_FUNCTION_ARGS)
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PageSetLSN(page, XLogRecPtrForTemp);
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WriteNoReleaseBuffer(buffer);
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}
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||||
|
||||
END_CRIT_SECTION();
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||||
}
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||||
else
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||||
{
|
||||
|
|
|
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|
|
@ -8,7 +8,7 @@
|
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* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.12 2006/03/29 21:17:36 tgl Exp $
|
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* $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.13 2006/03/30 23:03:10 tgl Exp $
|
||||
*-------------------------------------------------------------------------
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||||
*/
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#include "postgres.h"
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||||
|
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@ -25,11 +25,11 @@
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||||
typedef struct
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{
|
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gistxlogEntryUpdate *data;
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gistxlogPageUpdate *data;
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int len;
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IndexTuple *itup;
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OffsetNumber *todelete;
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} EntryUpdateRecord;
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} PageUpdateRecord;
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||||
|
||||
typedef struct
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||||
{
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||||
|
|
@ -58,16 +58,15 @@ typedef struct gistIncompleteInsert
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} gistIncompleteInsert;
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||||
|
||||
|
||||
MemoryContext opCtx;
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||||
MemoryContext insertCtx;
|
||||
static MemoryContext opCtx; /* working memory for operations */
|
||||
static MemoryContext insertCtx; /* holds incomplete_inserts list */
|
||||
static List *incomplete_inserts;
|
||||
|
||||
|
||||
#define ItemPointerEQ( a, b ) \
|
||||
( \
|
||||
ItemPointerGetOffsetNumber(a) == ItemPointerGetOffsetNumber(b) && \
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||||
ItemPointerGetBlockNumber (a) == ItemPointerGetBlockNumber(b) \
|
||||
)
|
||||
#define ItemPointerEQ(a, b) \
|
||||
( ItemPointerGetOffsetNumber(a) == ItemPointerGetOffsetNumber(b) && \
|
||||
ItemPointerGetBlockNumber (a) == ItemPointerGetBlockNumber(b) )
|
||||
|
||||
|
||||
static void
|
||||
pushIncompleteInsert(RelFileNode node, XLogRecPtr lsn, ItemPointerData key,
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||||
|
|
@ -101,7 +100,13 @@ pushIncompleteInsert(RelFileNode node, XLogRecPtr lsn, ItemPointerData key,
|
|||
}
|
||||
Assert(ninsert->lenblk > 0);
|
||||
|
||||
incomplete_inserts = lappend(incomplete_inserts, ninsert);
|
||||
/*
|
||||
* Stick the new incomplete insert onto the front of the list, not the
|
||||
* back. This is so that gist_xlog_cleanup will process incompletions
|
||||
* in last-in-first-out order.
|
||||
*/
|
||||
incomplete_inserts = lcons(ninsert, incomplete_inserts);
|
||||
|
||||
MemoryContextSwitchTo(oldCxt);
|
||||
}
|
||||
|
||||
|
|
@ -116,10 +121,9 @@ forgetIncompleteInsert(RelFileNode node, ItemPointerData key)
|
|||
|
||||
if (RelFileNodeEquals(node, insert->node) && ItemPointerEQ(&(insert->key), &(key)))
|
||||
{
|
||||
|
||||
/* found */
|
||||
pfree(insert->blkno);
|
||||
incomplete_inserts = list_delete_ptr(incomplete_inserts, insert);
|
||||
pfree(insert->blkno);
|
||||
pfree(insert);
|
||||
break;
|
||||
}
|
||||
|
|
@ -127,25 +131,25 @@ forgetIncompleteInsert(RelFileNode node, ItemPointerData key)
|
|||
}
|
||||
|
||||
static void
|
||||
decodeEntryUpdateRecord(EntryUpdateRecord *decoded, XLogRecord *record)
|
||||
decodePageUpdateRecord(PageUpdateRecord *decoded, XLogRecord *record)
|
||||
{
|
||||
char *begin = XLogRecGetData(record),
|
||||
*ptr;
|
||||
int i = 0,
|
||||
addpath = 0;
|
||||
|
||||
decoded->data = (gistxlogEntryUpdate *) begin;
|
||||
decoded->data = (gistxlogPageUpdate *) begin;
|
||||
|
||||
if (decoded->data->ntodelete)
|
||||
{
|
||||
decoded->todelete = (OffsetNumber *) (begin + sizeof(gistxlogEntryUpdate) + addpath);
|
||||
decoded->todelete = (OffsetNumber *) (begin + sizeof(gistxlogPageUpdate) + addpath);
|
||||
addpath = MAXALIGN(sizeof(OffsetNumber) * decoded->data->ntodelete);
|
||||
}
|
||||
else
|
||||
decoded->todelete = NULL;
|
||||
|
||||
decoded->len = 0;
|
||||
ptr = begin + sizeof(gistxlogEntryUpdate) + addpath;
|
||||
ptr = begin + sizeof(gistxlogPageUpdate) + addpath;
|
||||
while (ptr - begin < record->xl_len)
|
||||
{
|
||||
decoded->len++;
|
||||
|
|
@ -154,7 +158,7 @@ decodeEntryUpdateRecord(EntryUpdateRecord *decoded, XLogRecord *record)
|
|||
|
||||
decoded->itup = (IndexTuple *) palloc(sizeof(IndexTuple) * decoded->len);
|
||||
|
||||
ptr = begin + sizeof(gistxlogEntryUpdate) + addpath;
|
||||
ptr = begin + sizeof(gistxlogPageUpdate) + addpath;
|
||||
while (ptr - begin < record->xl_len)
|
||||
{
|
||||
decoded->itup[i] = (IndexTuple) ptr;
|
||||
|
|
@ -167,38 +171,30 @@ decodeEntryUpdateRecord(EntryUpdateRecord *decoded, XLogRecord *record)
|
|||
* redo any page update (except page split)
|
||||
*/
|
||||
static void
|
||||
gistRedoEntryUpdateRecord(XLogRecPtr lsn, XLogRecord *record, bool isnewroot)
|
||||
gistRedoPageUpdateRecord(XLogRecPtr lsn, XLogRecord *record, bool isnewroot)
|
||||
{
|
||||
EntryUpdateRecord xlrec;
|
||||
PageUpdateRecord xlrec;
|
||||
Relation reln;
|
||||
Buffer buffer;
|
||||
Page page;
|
||||
|
||||
decodeEntryUpdateRecord(&xlrec, record);
|
||||
/* nothing to do if whole page was backed up (and no info to do it with) */
|
||||
if (record->xl_info & XLR_BKP_BLOCK_1)
|
||||
return;
|
||||
|
||||
decodePageUpdateRecord(&xlrec, record);
|
||||
|
||||
reln = XLogOpenRelation(xlrec.data->node);
|
||||
buffer = XLogReadBuffer(reln, xlrec.data->blkno, false);
|
||||
if (!BufferIsValid(buffer))
|
||||
elog(PANIC, "block %u unfound", xlrec.data->blkno);
|
||||
return;
|
||||
page = (Page) BufferGetPage(buffer);
|
||||
|
||||
if (isnewroot)
|
||||
if (XLByteLE(lsn, PageGetLSN(page)))
|
||||
{
|
||||
if (!PageIsNew((PageHeader) page) && XLByteLE(lsn, PageGetLSN(page)))
|
||||
{
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
ReleaseBuffer(buffer);
|
||||
return;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (XLByteLE(lsn, PageGetLSN(page)))
|
||||
{
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
ReleaseBuffer(buffer);
|
||||
return;
|
||||
}
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
ReleaseBuffer(buffer);
|
||||
return;
|
||||
}
|
||||
|
||||
if (xlrec.data->isemptypage)
|
||||
|
|
@ -237,9 +233,9 @@ gistRedoEntryUpdateRecord(XLogRecPtr lsn, XLogRecord *record, bool isnewroot)
|
|||
GistClearTuplesDeleted(page);
|
||||
}
|
||||
|
||||
GistPageGetOpaque(page)->rightlink = InvalidBlockNumber;
|
||||
PageSetLSN(page, lsn);
|
||||
PageSetTLI(page, ThisTimeLineID);
|
||||
GistPageGetOpaque(page)->rightlink = InvalidBlockNumber;
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
WriteBuffer(buffer);
|
||||
|
||||
|
|
@ -294,38 +290,21 @@ gistRedoPageSplitRecord(XLogRecPtr lsn, XLogRecord *record)
|
|||
Buffer buffer;
|
||||
Page page;
|
||||
int i;
|
||||
int flags = 0;
|
||||
int flags;
|
||||
|
||||
decodePageSplitRecord(&xlrec, record);
|
||||
reln = XLogOpenRelation(xlrec.data->node);
|
||||
|
||||
/* first of all wee need get F_LEAF flag from original page */
|
||||
buffer = XLogReadBuffer(reln, xlrec.data->origblkno, false);
|
||||
if (!BufferIsValid(buffer))
|
||||
elog(PANIC, "block %u unfound", xlrec.data->origblkno);
|
||||
page = (Page) BufferGetPage(buffer);
|
||||
flags = (GistPageIsLeaf(page)) ? F_LEAF : 0;
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
ReleaseBuffer(buffer);
|
||||
flags = xlrec.data->origleaf ? F_LEAF : 0;
|
||||
|
||||
/* loop around all pages */
|
||||
for (i = 0; i < xlrec.data->npage; i++)
|
||||
{
|
||||
NewPage *newpage = xlrec.page + i;
|
||||
bool isorigpage = (xlrec.data->origblkno == newpage->header->blkno) ? true : false;
|
||||
|
||||
buffer = XLogReadBuffer(reln, newpage->header->blkno, !isorigpage);
|
||||
if (!BufferIsValid(buffer))
|
||||
elog(PANIC, "block %u unfound", newpage->header->blkno);
|
||||
buffer = XLogReadBuffer(reln, newpage->header->blkno, true);
|
||||
Assert(BufferIsValid(buffer));
|
||||
page = (Page) BufferGetPage(buffer);
|
||||
|
||||
if (XLByteLE(lsn, PageGetLSN(page)))
|
||||
{
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
ReleaseBuffer(buffer);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* ok, clear buffer */
|
||||
GISTInitBuffer(buffer, flags);
|
||||
|
||||
|
|
@ -399,12 +378,11 @@ gist_redo(XLogRecPtr lsn, XLogRecord *record)
|
|||
oldCxt = MemoryContextSwitchTo(opCtx);
|
||||
switch (info)
|
||||
{
|
||||
case XLOG_GIST_ENTRY_UPDATE:
|
||||
case XLOG_GIST_ENTRY_DELETE:
|
||||
gistRedoEntryUpdateRecord(lsn, record, false);
|
||||
case XLOG_GIST_PAGE_UPDATE:
|
||||
gistRedoPageUpdateRecord(lsn, record, false);
|
||||
break;
|
||||
case XLOG_GIST_NEW_ROOT:
|
||||
gistRedoEntryUpdateRecord(lsn, record, true);
|
||||
gistRedoPageUpdateRecord(lsn, record, true);
|
||||
break;
|
||||
case XLOG_GIST_PAGE_SPLIT:
|
||||
gistRedoPageSplitRecord(lsn, record);
|
||||
|
|
@ -433,7 +411,7 @@ out_target(StringInfo buf, RelFileNode node, ItemPointerData key)
|
|||
}
|
||||
|
||||
static void
|
||||
out_gistxlogEntryUpdate(StringInfo buf, gistxlogEntryUpdate *xlrec)
|
||||
out_gistxlogPageUpdate(StringInfo buf, gistxlogPageUpdate *xlrec)
|
||||
{
|
||||
out_target(buf, xlrec->node, xlrec->key);
|
||||
appendStringInfo(buf, "; block number %u", xlrec->blkno);
|
||||
|
|
@ -455,17 +433,13 @@ gist_desc(StringInfo buf, uint8 xl_info, char *rec)
|
|||
|
||||
switch (info)
|
||||
{
|
||||
case XLOG_GIST_ENTRY_UPDATE:
|
||||
appendStringInfo(buf, "entry_update: ");
|
||||
out_gistxlogEntryUpdate(buf, (gistxlogEntryUpdate *) rec);
|
||||
break;
|
||||
case XLOG_GIST_ENTRY_DELETE:
|
||||
appendStringInfo(buf, "entry_delete: ");
|
||||
out_gistxlogEntryUpdate(buf, (gistxlogEntryUpdate *) rec);
|
||||
case XLOG_GIST_PAGE_UPDATE:
|
||||
appendStringInfo(buf, "page_update: ");
|
||||
out_gistxlogPageUpdate(buf, (gistxlogPageUpdate *) rec);
|
||||
break;
|
||||
case XLOG_GIST_NEW_ROOT:
|
||||
appendStringInfo(buf, "new_root: ");
|
||||
out_target(buf, ((gistxlogEntryUpdate *) rec)->node, ((gistxlogEntryUpdate *) rec)->key);
|
||||
out_target(buf, ((gistxlogPageUpdate *) rec)->node, ((gistxlogPageUpdate *) rec)->key);
|
||||
break;
|
||||
case XLOG_GIST_PAGE_SPLIT:
|
||||
out_gistxlogPageSplit(buf, (gistxlogPageSplit *) rec);
|
||||
|
|
@ -506,60 +480,47 @@ gist_form_invalid_tuple(BlockNumber blkno)
|
|||
return tuple;
|
||||
}
|
||||
|
||||
static Buffer
|
||||
gistXLogReadAndLockBuffer(Relation r, BlockNumber blkno)
|
||||
{
|
||||
Buffer buffer = XLogReadBuffer(r, blkno, false);
|
||||
|
||||
if (!BufferIsValid(buffer))
|
||||
elog(PANIC, "block %u unfound", blkno);
|
||||
|
||||
return buffer;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
gixtxlogFindPath(Relation index, gistIncompleteInsert *insert)
|
||||
gistxlogFindPath(Relation index, gistIncompleteInsert *insert)
|
||||
{
|
||||
GISTInsertStack *top;
|
||||
|
||||
insert->pathlen = 0;
|
||||
insert->path = NULL;
|
||||
|
||||
if ((top = gistFindPath(index, insert->origblkno, gistXLogReadAndLockBuffer)) != NULL)
|
||||
if ((top = gistFindPath(index, insert->origblkno)) != NULL)
|
||||
{
|
||||
int i;
|
||||
GISTInsertStack *ptr = top;
|
||||
GISTInsertStack *ptr;
|
||||
|
||||
while (ptr)
|
||||
{
|
||||
for (ptr = top; ptr; ptr = ptr->parent)
|
||||
insert->pathlen++;
|
||||
ptr = ptr->parent;
|
||||
}
|
||||
|
||||
insert->path = (BlockNumber *) palloc(sizeof(BlockNumber) * insert->pathlen);
|
||||
|
||||
i = 0;
|
||||
ptr = top;
|
||||
while (ptr)
|
||||
{
|
||||
insert->path[i] = ptr->blkno;
|
||||
i++;
|
||||
ptr = ptr->parent;
|
||||
}
|
||||
for (ptr = top; ptr; ptr = ptr->parent)
|
||||
insert->path[i++] = ptr->blkno;
|
||||
}
|
||||
else
|
||||
elog(LOG, "lost parent for block %u", insert->origblkno);
|
||||
}
|
||||
|
||||
/*
|
||||
* Continue insert after crash. In normal situation, there isn't any incomplete
|
||||
* inserts, but if it might be after crash, WAL may has not a record of completetion.
|
||||
* Continue insert after crash. In normal situations, there aren't any
|
||||
* incomplete inserts, but if a crash occurs partway through an insertion
|
||||
* sequence, we'll need to finish making the index valid at the end of WAL
|
||||
* replay.
|
||||
*
|
||||
* Note that we assume the index is now in a valid state, except for the
|
||||
* unfinished insertion. In particular it's safe to invoke gistFindPath();
|
||||
* there shouldn't be any garbage pages for it to run into.
|
||||
*
|
||||
* Although stored LSN in gistIncompleteInsert is a LSN of child page,
|
||||
* we can compare it with LSN of parent, because parent is always locked
|
||||
* while we change child page (look at gistmakedeal). So if parent's LSN is
|
||||
* lesser than stored lsn then changes in parent doesn't do yet.
|
||||
* less than stored lsn then changes in parent aren't done yet.
|
||||
*/
|
||||
static void
|
||||
gistContinueInsert(gistIncompleteInsert *insert)
|
||||
|
|
@ -602,6 +563,12 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
|
||||
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
|
||||
WriteBuffer(buffer);
|
||||
|
||||
/*
|
||||
* XXX fall out to avoid making LOG message at bottom of routine.
|
||||
* I think the logic for when to emit that message is all wrong...
|
||||
*/
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -610,7 +577,7 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
int numbuffer;
|
||||
|
||||
/* construct path */
|
||||
gixtxlogFindPath(index, insert);
|
||||
gistxlogFindPath(index, insert);
|
||||
|
||||
Assert(insert->pathlen > 0);
|
||||
|
||||
|
|
@ -625,9 +592,8 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
childfound = 0;
|
||||
|
||||
numbuffer = 1;
|
||||
buffers[numbuffer - 1] = XLogReadBuffer(index, insert->path[i], false);
|
||||
if (!BufferIsValid(buffers[numbuffer - 1]))
|
||||
elog(PANIC, "block %u unfound", insert->path[i]);
|
||||
buffers[numbuffer - 1] = ReadBuffer(index, insert->path[i]);
|
||||
LockBuffer(buffers[numbuffer - 1], GIST_EXCLUSIVE);
|
||||
pages[numbuffer - 1] = BufferGetPage(buffers[numbuffer - 1]);
|
||||
|
||||
if (XLByteLE(insert->lsn, PageGetLSN(pages[numbuffer - 1])))
|
||||
|
|
@ -661,10 +627,9 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
|
||||
if (gistnospace(pages[numbuffer - 1], itup, lenitup))
|
||||
{
|
||||
/* no space left on page, so we should split */
|
||||
buffers[numbuffer] = XLogReadBuffer(index, P_NEW, true);
|
||||
if (!BufferIsValid(buffers[numbuffer]))
|
||||
elog(PANIC, "could not obtain new block");
|
||||
/* no space left on page, so we must split */
|
||||
buffers[numbuffer] = ReadBuffer(index, P_NEW);
|
||||
LockBuffer(buffers[numbuffer], GIST_EXCLUSIVE);
|
||||
GISTInitBuffer(buffers[numbuffer], 0);
|
||||
pages[numbuffer] = BufferGetPage(buffers[numbuffer]);
|
||||
gistfillbuffer(index, pages[numbuffer], itup, lenitup, FirstOffsetNumber);
|
||||
|
|
@ -678,7 +643,8 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
* we split root, just copy tuples from old root to new
|
||||
* page
|
||||
*/
|
||||
parentitup = gistextractbuffer(buffers[numbuffer - 1], &pituplen);
|
||||
parentitup = gistextractbuffer(buffers[numbuffer - 1],
|
||||
&pituplen);
|
||||
|
||||
/* sanity check */
|
||||
if (i + 1 != insert->pathlen)
|
||||
|
|
@ -686,9 +652,8 @@ gistContinueInsert(gistIncompleteInsert *insert)
|
|||
RelationGetRelationName(index));
|
||||
|
||||
/* fill new page */
|
||||
buffers[numbuffer] = XLogReadBuffer(index, P_NEW, true);
|
||||
if (!BufferIsValid(buffers[numbuffer]))
|
||||
elog(PANIC, "could not obtain new block");
|
||||
buffers[numbuffer] = ReadBuffer(index, P_NEW);
|
||||
LockBuffer(buffers[numbuffer], GIST_EXCLUSIVE);
|
||||
GISTInitBuffer(buffers[numbuffer], 0);
|
||||
pages[numbuffer] = BufferGetPage(buffers[numbuffer]);
|
||||
gistfillbuffer(index, pages[numbuffer], parentitup, pituplen, FirstOffsetNumber);
|
||||
|
|
@ -748,16 +713,10 @@ void
|
|||
gist_xlog_cleanup(void)
|
||||
{
|
||||
ListCell *l;
|
||||
List *reverse = NIL;
|
||||
MemoryContext oldCxt = MemoryContextSwitchTo(insertCtx);
|
||||
|
||||
/* we should call gistContinueInsert in reverse order */
|
||||
MemoryContext oldCxt;
|
||||
|
||||
oldCxt = MemoryContextSwitchTo(opCtx);
|
||||
foreach(l, incomplete_inserts)
|
||||
reverse = lappend(reverse, lfirst(l));
|
||||
|
||||
MemoryContextSwitchTo(opCtx);
|
||||
foreach(l, reverse)
|
||||
{
|
||||
gistIncompleteInsert *insert = (gistIncompleteInsert *) lfirst(l);
|
||||
|
||||
|
|
@ -772,10 +731,9 @@ gist_xlog_cleanup(void)
|
|||
|
||||
|
||||
XLogRecData *
|
||||
formSplitRdata(RelFileNode node, BlockNumber blkno,
|
||||
formSplitRdata(RelFileNode node, BlockNumber blkno, bool page_is_leaf,
|
||||
ItemPointer key, SplitedPageLayout *dist)
|
||||
{
|
||||
|
||||
XLogRecData *rdata;
|
||||
gistxlogPageSplit *xlrec = (gistxlogPageSplit *) palloc(sizeof(gistxlogPageSplit));
|
||||
SplitedPageLayout *ptr;
|
||||
|
|
@ -793,6 +751,7 @@ formSplitRdata(RelFileNode node, BlockNumber blkno,
|
|||
|
||||
xlrec->node = node;
|
||||
xlrec->origblkno = blkno;
|
||||
xlrec->origleaf = page_is_leaf;
|
||||
xlrec->npage = (uint16) npage;
|
||||
if (key)
|
||||
xlrec->key = *key;
|
||||
|
|
@ -825,68 +784,64 @@ formSplitRdata(RelFileNode node, BlockNumber blkno,
|
|||
return rdata;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Construct the rdata array for an XLOG record describing a page update
|
||||
* (deletion and/or insertion of tuples on a single index page).
|
||||
*
|
||||
* Note that both the todelete array and the tuples are marked as belonging
|
||||
* to the target buffer; they need not be stored in XLOG if XLogInsert decides
|
||||
* to log the whole buffer contents instead. Also, we take care that there's
|
||||
* at least one rdata item referencing the buffer, even when ntodelete and
|
||||
* ituplen are both zero; this ensures that XLogInsert knows about the buffer.
|
||||
*/
|
||||
XLogRecData *
|
||||
formUpdateRdata(RelFileNode node, BlockNumber blkno,
|
||||
formUpdateRdata(RelFileNode node, Buffer buffer,
|
||||
OffsetNumber *todelete, int ntodelete, bool emptypage,
|
||||
IndexTuple *itup, int ituplen, ItemPointer key)
|
||||
{
|
||||
XLogRecData *rdata;
|
||||
gistxlogEntryUpdate *xlrec = (gistxlogEntryUpdate *) palloc(sizeof(gistxlogEntryUpdate));
|
||||
gistxlogPageUpdate *xlrec;
|
||||
int cur,
|
||||
i;
|
||||
|
||||
/* ugly wart in API: emptypage causes us to ignore other inputs */
|
||||
if (emptypage)
|
||||
ntodelete = ituplen = 0;
|
||||
|
||||
rdata = (XLogRecData *) palloc(sizeof(XLogRecData) * (2 + ituplen));
|
||||
xlrec = (gistxlogPageUpdate *) palloc(sizeof(gistxlogPageUpdate));
|
||||
|
||||
xlrec->node = node;
|
||||
xlrec->blkno = blkno;
|
||||
xlrec->blkno = BufferGetBlockNumber(buffer);
|
||||
xlrec->ntodelete = ntodelete;
|
||||
xlrec->isemptypage = emptypage;
|
||||
if (key)
|
||||
xlrec->key = *key;
|
||||
else
|
||||
ItemPointerSetInvalid(&(xlrec->key));
|
||||
|
||||
if (emptypage)
|
||||
rdata[0].data = (char *) xlrec;
|
||||
rdata[0].len = sizeof(gistxlogPageUpdate);
|
||||
rdata[0].buffer = InvalidBuffer;
|
||||
rdata[0].next = &(rdata[1]);
|
||||
|
||||
rdata[1].data = (char *) todelete;
|
||||
rdata[1].len = MAXALIGN(sizeof(OffsetNumber) * ntodelete);
|
||||
rdata[1].buffer = buffer;
|
||||
rdata[1].buffer_std = true;
|
||||
rdata[1].next = NULL;
|
||||
|
||||
/* new tuples */
|
||||
cur = 2;
|
||||
for (i = 0; i < ituplen; i++)
|
||||
{
|
||||
xlrec->isemptypage = true;
|
||||
xlrec->ntodelete = 0;
|
||||
|
||||
rdata = (XLogRecData *) palloc(sizeof(XLogRecData));
|
||||
rdata->buffer = InvalidBuffer;
|
||||
rdata->data = (char *) xlrec;
|
||||
rdata->len = sizeof(gistxlogEntryUpdate);
|
||||
rdata->next = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
int cur = 1,
|
||||
i;
|
||||
|
||||
xlrec->isemptypage = false;
|
||||
xlrec->ntodelete = ntodelete;
|
||||
|
||||
rdata = (XLogRecData *) palloc(sizeof(XLogRecData) * (2 + ituplen));
|
||||
|
||||
rdata->buffer = InvalidBuffer;
|
||||
rdata->data = (char *) xlrec;
|
||||
rdata->len = sizeof(gistxlogEntryUpdate);
|
||||
rdata->next = NULL;
|
||||
|
||||
if (ntodelete)
|
||||
{
|
||||
rdata[cur - 1].next = &(rdata[cur]);
|
||||
rdata[cur].buffer = InvalidBuffer;
|
||||
rdata[cur].data = (char *) todelete;
|
||||
rdata[cur].len = MAXALIGN(sizeof(OffsetNumber) * ntodelete);
|
||||
rdata[cur].next = NULL;
|
||||
cur++;
|
||||
}
|
||||
|
||||
/* new tuples */
|
||||
for (i = 0; i < ituplen; i++)
|
||||
{
|
||||
rdata[cur].buffer = InvalidBuffer;
|
||||
rdata[cur].data = (char *) (itup[i]);
|
||||
rdata[cur].len = IndexTupleSize(itup[i]);
|
||||
rdata[cur].next = NULL;
|
||||
rdata[cur - 1].next = &(rdata[cur]);
|
||||
cur++;
|
||||
}
|
||||
rdata[cur - 1].next = &(rdata[cur]);
|
||||
rdata[cur].data = (char *) (itup[i]);
|
||||
rdata[cur].len = IndexTupleSize(itup[i]);
|
||||
rdata[cur].buffer = buffer;
|
||||
rdata[cur].buffer_std = true;
|
||||
rdata[cur].next = NULL;
|
||||
cur++;
|
||||
}
|
||||
|
||||
return rdata;
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.11 2006/03/24 04:32:13 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.12 2006/03/30 23:03:10 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -80,11 +80,13 @@ typedef GISTScanOpaqueData *GISTScanOpaque;
|
|||
/* XLog stuff */
|
||||
extern const XLogRecPtr XLogRecPtrForTemp;
|
||||
|
||||
#define XLOG_GIST_ENTRY_UPDATE 0x00
|
||||
#define XLOG_GIST_ENTRY_DELETE 0x10
|
||||
#define XLOG_GIST_NEW_ROOT 0x20
|
||||
#define XLOG_GIST_PAGE_UPDATE 0x00
|
||||
#define XLOG_GIST_NEW_ROOT 0x20
|
||||
#define XLOG_GIST_PAGE_SPLIT 0x30
|
||||
#define XLOG_GIST_INSERT_COMPLETE 0x40
|
||||
#define XLOG_GIST_CREATE_INDEX 0x50
|
||||
|
||||
typedef struct gistxlogEntryUpdate
|
||||
typedef struct gistxlogPageUpdate
|
||||
{
|
||||
RelFileNode node;
|
||||
BlockNumber blkno;
|
||||
|
|
@ -100,17 +102,16 @@ typedef struct gistxlogEntryUpdate
|
|||
/*
|
||||
* follow: 1. todelete OffsetNumbers 2. tuples to insert
|
||||
*/
|
||||
} gistxlogEntryUpdate;
|
||||
|
||||
#define XLOG_GIST_PAGE_SPLIT 0x30
|
||||
} gistxlogPageUpdate;
|
||||
|
||||
typedef struct gistxlogPageSplit
|
||||
{
|
||||
RelFileNode node;
|
||||
BlockNumber origblkno; /* splitted page */
|
||||
bool origleaf; /* was splitted page a leaf page? */
|
||||
uint16 npage;
|
||||
|
||||
/* see comments on gistxlogEntryUpdate */
|
||||
/* see comments on gistxlogPageUpdate */
|
||||
ItemPointerData key;
|
||||
|
||||
/*
|
||||
|
|
@ -118,22 +119,19 @@ typedef struct gistxlogPageSplit
|
|||
*/
|
||||
} gistxlogPageSplit;
|
||||
|
||||
#define XLOG_GIST_INSERT_COMPLETE 0x40
|
||||
|
||||
typedef struct gistxlogPage
|
||||
{
|
||||
BlockNumber blkno;
|
||||
int num;
|
||||
int num; /* number of index tuples following */
|
||||
} gistxlogPage;
|
||||
|
||||
#define XLOG_GIST_CREATE_INDEX 0x50
|
||||
|
||||
typedef struct gistxlogInsertComplete
|
||||
{
|
||||
RelFileNode node;
|
||||
/* follows ItemPointerData key to clean */
|
||||
} gistxlogInsertComplete;
|
||||
|
||||
|
||||
/* SplitedPageLayout - gistSplit function result */
|
||||
typedef struct SplitedPageLayout
|
||||
{
|
||||
|
|
@ -239,8 +237,7 @@ extern void gistnewroot(Relation r, Buffer buffer, IndexTuple *itup, int len, It
|
|||
extern IndexTuple *gistSplit(Relation r, Buffer buffer, IndexTuple *itup,
|
||||
int *len, SplitedPageLayout **dist, GISTSTATE *giststate);
|
||||
|
||||
extern GISTInsertStack *gistFindPath(Relation r, BlockNumber child,
|
||||
Buffer (*myReadBuffer) (Relation, BlockNumber));
|
||||
extern GISTInsertStack *gistFindPath(Relation r, BlockNumber child);
|
||||
|
||||
/* gistxlog.c */
|
||||
extern void gist_redo(XLogRecPtr lsn, XLogRecord *record);
|
||||
|
|
@ -249,11 +246,12 @@ extern void gist_xlog_startup(void);
|
|||
extern void gist_xlog_cleanup(void);
|
||||
extern IndexTuple gist_form_invalid_tuple(BlockNumber blkno);
|
||||
|
||||
extern XLogRecData *formUpdateRdata(RelFileNode node, BlockNumber blkno,
|
||||
extern XLogRecData *formUpdateRdata(RelFileNode node, Buffer buffer,
|
||||
OffsetNumber *todelete, int ntodelete, bool emptypage,
|
||||
IndexTuple *itup, int ituplen, ItemPointer key);
|
||||
|
||||
extern XLogRecData *formSplitRdata(RelFileNode node, BlockNumber blkno,
|
||||
extern XLogRecData *formSplitRdata(RelFileNode node,
|
||||
BlockNumber blkno, bool page_is_leaf,
|
||||
ItemPointer key, SplitedPageLayout *dist);
|
||||
|
||||
extern XLogRecPtr gistxlogInsertCompletion(RelFileNode node, ItemPointerData *keys, int len);
|
||||
|
|
|
|||
Loading…
Reference in New Issue