Adjust pgstatindex() to give correct answers for indexes larger than
2^31 blocks. Also fix pg_relpages() for the same case. Tatsuhito Kasahara
This commit is contained in:
Tom Lane
parent
458c585697
commit
d287818eb5
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@ -59,19 +59,19 @@ PG_FUNCTION_INFO_V1(pg_relpages);
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typedef struct BTIndexStat
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{
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uint32 version;
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BlockNumber root_blkno;
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uint32 level;
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BlockNumber root_blkno;
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uint32 root_pages;
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uint32 internal_pages;
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uint32 leaf_pages;
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uint32 empty_pages;
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uint32 deleted_pages;
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uint64 root_pages;
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uint64 internal_pages;
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uint64 leaf_pages;
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uint64 empty_pages;
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uint64 deleted_pages;
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uint32 max_avail;
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uint32 free_space;
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uint64 max_avail;
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uint64 free_space;
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uint32 fragments;
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uint64 fragments;
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} BTIndexStat;
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/* ------------------------------------------------------
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@ -87,8 +87,8 @@ pgstatindex(PG_FUNCTION_ARGS)
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Relation rel;
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RangeVar *relrv;
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Datum result;
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uint32 nblocks;
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uint32 blkno;
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BlockNumber nblocks;
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BlockNumber blkno;
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BTIndexStat indexStat;
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if (!superuser())
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@ -112,30 +112,29 @@ pgstatindex(PG_FUNCTION_ARGS)
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BTMetaPageData *metad = BTPageGetMeta(page);
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indexStat.version = metad->btm_version;
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indexStat.root_blkno = metad->btm_root;
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indexStat.level = metad->btm_level;
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indexStat.root_blkno = metad->btm_root;
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ReleaseBuffer(buffer);
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}
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nblocks = RelationGetNumberOfBlocks(rel);
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/* -- init stat -- */
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indexStat.fragments = 0;
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/* -- init counters -- */
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indexStat.root_pages = 0;
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indexStat.leaf_pages = 0;
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indexStat.internal_pages = 0;
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indexStat.leaf_pages = 0;
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indexStat.empty_pages = 0;
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indexStat.deleted_pages = 0;
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indexStat.max_avail = 0;
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indexStat.free_space = 0;
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/*-----------------------
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* Scan all blocks
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*-----------------------
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indexStat.fragments = 0;
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/*
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* Scan all blocks except the metapage
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*/
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nblocks = RelationGetNumberOfBlocks(rel);
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for (blkno = 1; blkno < nblocks; blkno++)
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{
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Buffer buffer;
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@ -151,13 +150,7 @@ pgstatindex(PG_FUNCTION_ARGS)
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/* Determine page type, and update totals */
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if (P_ISDELETED(opaque))
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indexStat.deleted_pages++;
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else if (P_IGNORE(opaque))
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indexStat.empty_pages++;
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else if (P_ISLEAF(opaque))
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if (P_ISLEAF(opaque))
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{
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int max_avail;
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@ -174,9 +167,12 @@ pgstatindex(PG_FUNCTION_ARGS)
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if (opaque->btpo_next != P_NONE && opaque->btpo_next < blkno)
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indexStat.fragments++;
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}
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else if (P_ISDELETED(opaque))
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indexStat.deleted_pages++;
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else if (P_IGNORE(opaque))
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indexStat.empty_pages++;
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else if (P_ISROOT(opaque))
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indexStat.root_pages++;
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else
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indexStat.internal_pages++;
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@ -207,25 +203,26 @@ pgstatindex(PG_FUNCTION_ARGS)
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.level);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", (indexStat.root_pages +
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indexStat.leaf_pages +
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indexStat.internal_pages +
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indexStat.deleted_pages +
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indexStat.empty_pages) * BLCKSZ);
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snprintf(values[j++], 32, INT64_FORMAT,
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(indexStat.root_pages +
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indexStat.leaf_pages +
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indexStat.internal_pages +
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indexStat.deleted_pages +
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indexStat.empty_pages) * BLCKSZ);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.root_blkno);
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snprintf(values[j++], 32, "%u", indexStat.root_blkno);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.internal_pages);
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snprintf(values[j++], 32, INT64_FORMAT, indexStat.internal_pages);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.leaf_pages);
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snprintf(values[j++], 32, INT64_FORMAT, indexStat.leaf_pages);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.empty_pages);
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snprintf(values[j++], 32, INT64_FORMAT, indexStat.empty_pages);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%d", indexStat.deleted_pages);
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snprintf(values[j++], 32, INT64_FORMAT, indexStat.deleted_pages);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%.2f", 100.0 - (float) indexStat.free_space / (float) indexStat.max_avail * 100.0);
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snprintf(values[j++], 32, "%.2f", 100.0 - (double) indexStat.free_space / (double) indexStat.max_avail * 100.0);
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values[j] = palloc(32);
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snprintf(values[j++], 32, "%.2f", (float) indexStat.fragments / (float) indexStat.leaf_pages * 100.0);
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snprintf(values[j++], 32, "%.2f", (double) indexStat.fragments / (double) indexStat.leaf_pages * 100.0);
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tuple = BuildTupleFromCStrings(TupleDescGetAttInMetadata(tupleDesc),
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values);
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@ -249,9 +246,9 @@ Datum
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pg_relpages(PG_FUNCTION_ARGS)
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{
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text *relname = PG_GETARG_TEXT_P(0);
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int64 relpages;
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Relation rel;
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RangeVar *relrv;
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int4 relpages;
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if (!superuser())
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ereport(ERROR,
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@ -265,5 +262,5 @@ pg_relpages(PG_FUNCTION_ARGS)
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relation_close(rel, AccessShareLock);
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PG_RETURN_INT32(relpages);
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PG_RETURN_INT64(relpages);
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}
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@ -1,4 +1,4 @@
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/* $PostgreSQL: pgsql/contrib/pgstattuple/pgstattuple.sql.in,v 1.15 2007/11/13 04:24:28 momjian Exp $ */
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/* $PostgreSQL: pgsql/contrib/pgstattuple/pgstattuple.sql.in,v 1.16 2008/03/21 03:23:30 tgl Exp $ */
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-- Adjust this setting to control where the objects get created.
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SET search_path = public;
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@ -7,12 +7,12 @@ CREATE OR REPLACE FUNCTION pgstattuple(IN relname text,
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OUT table_len BIGINT, -- physical table length in bytes
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OUT tuple_count BIGINT, -- number of live tuples
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OUT tuple_len BIGINT, -- total tuples length in bytes
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OUT tuple_percent FLOAT, -- live tuples in %
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OUT tuple_percent FLOAT8, -- live tuples in %
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OUT dead_tuple_count BIGINT, -- number of dead tuples
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OUT dead_tuple_len BIGINT, -- total dead tuples length in bytes
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OUT dead_tuple_percent FLOAT, -- dead tuples in %
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OUT dead_tuple_percent FLOAT8, -- dead tuples in %
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OUT free_space BIGINT, -- free space in bytes
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OUT free_percent FLOAT) -- free space in %
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OUT free_percent FLOAT8) -- free space in %
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AS 'MODULE_PATHNAME', 'pgstattuple'
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LANGUAGE C STRICT;
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@ -20,36 +20,30 @@ CREATE OR REPLACE FUNCTION pgstattuple(IN reloid oid,
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OUT table_len BIGINT, -- physical table length in bytes
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OUT tuple_count BIGINT, -- number of live tuples
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OUT tuple_len BIGINT, -- total tuples length in bytes
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OUT tuple_percent FLOAT, -- live tuples in %
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OUT tuple_percent FLOAT8, -- live tuples in %
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OUT dead_tuple_count BIGINT, -- number of dead tuples
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OUT dead_tuple_len BIGINT, -- total dead tuples length in bytes
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OUT dead_tuple_percent FLOAT, -- dead tuples in %
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OUT dead_tuple_percent FLOAT8, -- dead tuples in %
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OUT free_space BIGINT, -- free space in bytes
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OUT free_percent FLOAT) -- free space in %
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OUT free_percent FLOAT8) -- free space in %
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AS 'MODULE_PATHNAME', 'pgstattuplebyid'
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LANGUAGE C STRICT;
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--
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-- pgstatindex
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--
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CREATE OR REPLACE FUNCTION pgstatindex(IN relname text,
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OUT version int4,
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OUT tree_level int4,
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OUT index_size int4,
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OUT root_block_no int4,
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OUT internal_pages int4,
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OUT leaf_pages int4,
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OUT empty_pages int4,
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OUT deleted_pages int4,
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OUT avg_leaf_density float8,
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OUT leaf_fragmentation float8)
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OUT version INT,
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OUT tree_level INT,
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OUT index_size BIGINT,
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OUT root_block_no BIGINT,
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OUT internal_pages BIGINT,
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OUT leaf_pages BIGINT,
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OUT empty_pages BIGINT,
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OUT deleted_pages BIGINT,
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OUT avg_leaf_density FLOAT8,
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OUT leaf_fragmentation FLOAT8)
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AS 'MODULE_PATHNAME', 'pgstatindex'
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LANGUAGE C STRICT;
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--
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-- pg_relpages()
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--
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CREATE OR REPLACE FUNCTION pg_relpages(text)
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RETURNS int
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CREATE OR REPLACE FUNCTION pg_relpages(IN relname text)
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RETURNS BIGINT
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AS 'MODULE_PATHNAME', 'pg_relpages'
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LANGUAGE C STRICT;
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/pgstattuple.sgml,v 1.3 2007/12/10 05:32:51 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/pgstattuple.sgml,v 1.4 2008/03/21 03:23:30 tgl Exp $ -->
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<sect1 id="pgstattuple">
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<title>pgstattuple</title>
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@ -190,37 +190,37 @@ leaf_fragmentation | 0
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<row>
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<entry><structfield>index_size</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Total number of pages in index</entry>
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</row>
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<row>
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<entry><structfield>root_block_no</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Location of root block</entry>
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</row>
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<row>
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<entry><structfield>internal_pages</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Number of <quote>internal</> (upper-level) pages</entry>
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</row>
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<row>
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<entry><structfield>leaf_pages</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Number of leaf pages</entry>
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</row>
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<row>
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<entry><structfield>empty_pages</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Number of empty pages</entry>
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</row>
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<row>
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<entry><structfield>deleted_pages</structfield></entry>
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<entry><type>integer</type></entry>
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<entry><type>bigint</type></entry>
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<entry>Number of deleted pages</entry>
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</row>
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@ -250,7 +250,7 @@ leaf_fragmentation | 0
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<varlistentry>
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<term>
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<function>pg_relpages(text) returns integer</>
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<function>pg_relpages(text) returns bigint</>
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</term>
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<listitem>
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@ -264,10 +264,10 @@ leaf_fragmentation | 0
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</sect2>
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<sect2>
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<title>Author</title>
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<title>Authors</title>
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<para>
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Tatsuo Ishii
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Tatsuo Ishii and Satoshi Nagayasu
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</para>
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</sect2>
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