index 54c916e0347f4b6d125e0f144e9c70083d6da5ee..a4e732a3f547811b182d09022bb034c5400ce621 100644 (file)
uint32 multixacts;
uint32 victim_multixacts;
double fraction;
+ int result;
/* If we can't determine member space utilization, assume the worst. */
if (!ReadMultiXactCounts(&multixacts, &members))
/* 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