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pgsql: Fix scaling of autovacuum freeze scores. 2+ messages / 1 participants [nested] [flat]
* pgsql: Fix scaling of autovacuum freeze scores. @ 2026-09-01 20:21 Nathan Bossart <nathan@postgresql.org> 0 siblings, 0 replies; 2+ messages in thread From: Nathan Bossart @ 2026-09-01 20:21 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org Fix scaling of autovacuum freeze scores. Sufficiently large settings of the *_freeze_score_weight parameters can lower the scaling thresholds below the *_freeze_max_age settings. This can lead the scoring code to raise a value < 1.0 to a power > 1.0, thus lowering the score, which is the opposite of what is intended. To fix, only exponentiate the scores when doing so won't lower their values. Oversight in commit d7965d65fc. Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com> Reviewed-by: Greg Burd <greg@burd.me> Discussion: https://postgr.es/m/apWcbq91BAfhmsKU%40nathan Backpatch-through: 19 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/49e098b41420aebda60804410b33fcbb5279503f Modified Files -------------- src/backend/postmaster/autovacuum.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
* pgsql: Fix scaling of autovacuum freeze scores. @ 2026-09-01 20:21 Nathan Bossart <nathan@postgresql.org> 0 siblings, 0 replies; 2+ messages in thread From: Nathan Bossart @ 2026-09-01 20:21 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org Fix scaling of autovacuum freeze scores. Sufficiently large settings of the *_freeze_score_weight parameters can lower the scaling thresholds below the *_freeze_max_age settings. This can lead the scoring code to raise a value < 1.0 to a power > 1.0, thus lowering the score, which is the opposite of what is intended. To fix, only exponentiate the scores when doing so won't lower their values. Oversight in commit d7965d65fc. Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com> Reviewed-by: Greg Burd <greg@burd.me> Discussion: https://postgr.es/m/apWcbq91BAfhmsKU%40nathan Backpatch-through: 19 Branch ------ REL_19_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/1bda0b23bce47ab19d518ba51b26b9caed967782 Modified Files -------------- src/backend/postmaster/autovacuum.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2026-09-01 20:21 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2026-09-01 20:21 pgsql: Fix scaling of autovacuum freeze scores. Nathan Bossart <nathan@postgresql.org> 2026-09-01 20:21 pgsql: Fix scaling of autovacuum freeze scores. Nathan Bossart <nathan@postgresql.org>
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