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Make GIN's cleanup pending list process interruptable 

Cleanup process could be called by ordinary insert/update and could take a lot
of time. Add vacuum_delay_point() to make this process interruptable. Under
vacuum this call will also throttle a vacuum process to decrease system load,
called from insert/update it will not throttle, and that reduces a latency.

Backpatch for all supported branches.

Jeff Janes <jeff.janes@gmail.com>
This commit is contained in:
Teodor Sigaev 2015-09-07 17:20:44 +03:00
parent fad42aae97
commit a7496aee61
1 changed files with 3 additions and 5 deletions
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8
src/backend/access/gin/ginfast.c
View File

@ -759,8 +759,7 @@ ginInsertCleanup(Relation index, GinState *ginstate,
*/
processPendingPage(&accum, &datums, page, FirstOffsetNumber);
if (vac_delay)
vacuum_delay_point();
vacuum_delay_point();
/*
* Is it time to flush memory to disk? Flush if we are at the end of
@ -797,8 +796,7 @@ ginInsertCleanup(Relation index, GinState *ginstate,
while ((list = ginGetEntry(&accum, &attnum, &entry, &nlist)) != NULL)
{
ginEntryInsert(index, ginstate, attnum, entry, list, nlist, FALSE);
if (vac_delay)
vacuum_delay_point();
vacuum_delay_point();
}
/*
@ -877,7 +875,7 @@ ginInsertCleanup(Relation index, GinState *ginstate,
/*
* Read next page in pending list
*/
CHECK_FOR_INTERRUPTS();
vacuum_delay_point();
buffer = ReadBuffer(index, blkno);
LockBuffer(buffer, GIN_SHARE);
page = BufferGetPage(buffer);