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| author | Robert Haas <rhaas@postgresql.org> | 2012-01-25 20:40:34 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2012-01-25 20:41:52 -0500 |
| commit | 9f9135d129e915e72c8a2f770689fd72619ead49 (patch) | |
| tree | 644c9d0a29e9ccc7b2fd21a00931d62d7bd5094c /src/backend/executor/nodeIndexonlyscan.c | |
| parent | 08146775acd8bfe0fcc509c71857abb928697171 (diff) | |
Instrument index-only scans to count heap fetches performed.
Patch by me; review by Tom Lane, Jeff Davis, and Peter Geoghegan.
Diffstat (limited to 'src/backend/executor/nodeIndexonlyscan.c')
| -rw-r--r-- | src/backend/executor/nodeIndexonlyscan.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/backend/executor/nodeIndexonlyscan.c b/src/backend/executor/nodeIndexonlyscan.c index 7f1100e15e4..4abd805aa31 100644 --- a/src/backend/executor/nodeIndexonlyscan.c +++ b/src/backend/executor/nodeIndexonlyscan.c @@ -90,6 +90,7 @@ IndexOnlyNext(IndexOnlyScanState *node) /* * Rats, we have to visit the heap to check visibility. */ + node->ioss_HeapFetches++; tuple = index_fetch_heap(scandesc); if (tuple == NULL) continue; /* no visible tuple, try next index entry */ @@ -346,6 +347,7 @@ ExecInitIndexOnlyScan(IndexOnlyScan *node, EState *estate, int eflags) indexstate = makeNode(IndexOnlyScanState); indexstate->ss.ps.plan = (Plan *) node; indexstate->ss.ps.state = estate; + indexstate->ioss_HeapFetches = 0; /* * Miscellaneous initialization |