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| author | Fujii Masao <fujii@postgresql.org> | 2020-07-06 14:27:09 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2020-07-06 14:27:09 +0900 |
| commit | 321fa6a4a26c9b649a0fbec9fc8b019f19e62289 (patch) | |
| tree | e62cc9f65421381ce345259732c1bbdb7aa4a64f /src/backend/access/gist/gist.c | |
| parent | aa38434824c4fa52e55a9c7465b24c246caddc81 (diff) | |
| download | postgresql-321fa6a4a26c9b649a0fbec9fc8b019f19e62289.tar.gz postgresql-321fa6a4a26c9b649a0fbec9fc8b019f19e62289.zip | |
doc: Add note about possible performance overhead by enabling track_planning.
Enabling pg_stat_statements.track_plaanning may incur a noticeable
performance penalty, especially when a fewer kinds of queries are executed
on many concurrent connections. This commit documents this note.
Back-patch to v13 where pg_stat_statements.track_plaanning was added.
Suggested-by: Pavel Stehule
Author: Fujii Masao
Reviewed-by: Pavel Stehule
Discussion: https://postgr.es/m/CAFj8pRC9Jxa8r5i0TNBWLb8mzuaYzEoLq3QOvip0jVpHPOLbVA@mail.gmail.com
Diffstat (limited to 'src/backend/access/gist/gist.c')
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