diff options
| -rw-r--r-- | src/backend/access/transam/multixact.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c index 383c991ced2..a676966b877 100644 --- a/src/backend/access/transam/multixact.c +++ b/src/backend/access/transam/multixact.c @@ -2828,6 +2828,7 @@ MultiXactMemberFreezeThreshold(void) uint32 multixacts; uint32 victim_multixacts; double fraction; + int result; /* If we can't determine member space utilization, assume the worst. */ if (!ReadMultiXactCounts(&multixacts, &members)) @@ -2849,7 +2850,13 @@ MultiXactMemberFreezeThreshold(void) /* fraction could be > 1.0, but lowest possible freeze age is zero */ if (victim_multixacts > multixacts) return 0; - return multixacts - victim_multixacts; + result = multixacts - victim_multixacts; + + /* + * Clamp to autovacuum_multixact_freeze_max_age, so that we never make + * autovacuum less aggressive than it would otherwise be. + */ + return Min(result, autovacuum_multixact_freeze_max_age); } typedef struct mxtruncinfo |