diff options
Diffstat (limited to 'contrib/pg_upgrade/server.c')
| -rw-r--r-- | contrib/pg_upgrade/server.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/contrib/pg_upgrade/server.c b/contrib/pg_upgrade/server.c index 4d5f37301b4..9331667b8b7 100644 --- a/contrib/pg_upgrade/server.c +++ b/contrib/pg_upgrade/server.c @@ -172,7 +172,9 @@ start_postmaster(ClusterInfo *cluster, bool quiet) * * Using autovacuum=off disables cleanup vacuum and analyze, but * freeze vacuums can still happen, so we set - * autovacuum_freeze_max_age high too. + * autovacuum_freeze_max_age very high. We assume all datfrozenxid and + * relfrozen values are less than a gap of 2000000000 from the current + * xid counter, so autovacuum will not touch them. */ snprintf(cmd, sizeof(cmd), SYSTEMQUOTE "\"%s/pg_ctl\" -l \"%s\" -D \"%s\" " |