Fix per-relation memory leakage in autovacuum. PgStat_StatTabEntry and AutoVacOpts structs were leaked until the end of the autovacuum worker's run, which is bad news if there are a lot of relations in the database.
Note: pfree'ing the PgStat_StatTabEntry structs here seems a bit risky, because pgstat_fetch_stat_tabentry_ext does not guarantee anything about whether its result is long-lived. It appears okay so long as autovacuum forces PGSTAT_FETCH_CONSISTENCY_NONE, but I think that API could use a re-think. Also ensure that the VacuumRelation structure passed to vacuum() is in recoverable storage. Back-patch to v15 where we started to manage table statistics this way. (The AutoVacOpts leakage is probably older, but I'm not excited enough to worry about just that part.) Author: Tom Lane <t...@sss.pgh.pa.us> Reviewed-by: Andres Freund <and...@anarazel.de> Discussion: https://postgr.es/m/285483.1746756...@sss.pgh.pa.us Backpatch-through: 15 Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/13d21b48a3a4eef4227339d177a5ce2ed2879447 Modified Files -------------- src/backend/postmaster/autovacuum.c | 38 +++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-)
