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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-04-21 04:10:53 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-04-21 04:10:53 +0000 |
| commit | 11da4c671ea6391c59ed5f465e390c6635e54cf4 (patch) | |
| tree | 17f7b8bb6e854b778d6d16f70434d97fa85cf27d /src/backend/executor | |
| parent | ca3d14f2a98b49d989090c800835b80087286cb4 (diff) | |
| download | postgresql-11da4c671ea6391c59ed5f465e390c6635e54cf4.tar.gz postgresql-11da4c671ea6391c59ed5f465e390c6635e54cf4.zip | |
Adjust pgstat_initstats() to avoid repeated searches of the TabStat arrays
when a relation is opened multiple times in the same transaction. This is
particularly useful for system catalogs, which we may heap_open or index_open
many times in a transaction, and it doesn't really cost anything extra even
if the rel is touched but once. Motivated by study of an example from Greg
Stark, in which pgstat_initstats() accounted for an unreasonably large
fraction of the runtime.
Diffstat (limited to 'src/backend/executor')
0 files changed, 0 insertions, 0 deletions