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Make EXPLAIN (BUFFERS) track blocks dirtied, as well as those written.

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Also expose the new counters through pg_stat_statements.

Patch by me.  Review by Fujii Masao and Greg Smith.
This commit is contained in:
Robert Haas
2012-02-22 20:33:05 -05:00
parent f74f9a277c
commit 2254367435
12 changed files with 148 additions and 10 deletions
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1
src/backend/storage/buffer/bufmgr.c
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@@ -988,6 +988,7 @@ MarkBufferDirty(Buffer buffer)
if (dirtied)
{
VacuumPageDirty++;
pgBufferUsage.shared_blks_dirtied++;
if (VacuumCostActive)
VacuumCostBalance += VacuumCostPageDirty;
if (ProcGlobal->bgwriterLatch)

4
src/backend/storage/buffer/localbuf.c
View File

@@ -276,6 +276,10 @@ MarkLocalBufferDirty(Buffer buffer)
Assert(LocalRefCount[bufid] > 0);
bufHdr = &LocalBufferDescriptors[bufid];
if (!(bufHdr->flags & BM_DIRTY))
pgBufferUsage.local_blks_dirtied++;
bufHdr->flags |= BM_DIRTY;
}