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| author | Noah Misch <noah@leadboat.com> | 2024-11-02 09:04:55 -0700 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2024-11-02 09:05:05 -0700 |
| commit | bb30542976618e6d0cd9eb2358824b741566ffbf (patch) | |
| tree | d70f2464da182272ba9ba6cb0638afbb7ef88937 /src/tutorial/funcs.c | |
| parent | 4c708872950374dce23a61a1eba1411d9498d5d2 (diff) | |
| download | postgresql-bb30542976618e6d0cd9eb2358824b741566ffbf.tar.gz postgresql-bb30542976618e6d0cd9eb2358824b741566ffbf.zip | |
Move I/O before the index_update_stats() buffer lock region.
Commit a07e03fd8fa7daf4d1356f7cb501ffe784ea6257 enlarged the work done
here under the pg_class heap buffer lock. Two preexisting actions are
best done before holding that lock. Both RelationGetNumberOfBlocks()
and visibilitymap_count() do I/O, and the latter might exclusive-lock a
visibility map buffer. Moving these reduces contention and risk of
undetected LWLock deadlock. Back-patch to v12, like that commit.
Discussion: https://postgr.es/m/20241031200139.b4@rfd.leadboat.com
Diffstat (limited to 'src/tutorial/funcs.c')
0 files changed, 0 insertions, 0 deletions