As a safety device, an aggressive vacuum scan will

occur for any table whose multixact-age is greater than <xref

linkend="guc-autovacuum-multixact-freeze-max-age"/>. Also, if the

storage occupied by multixacts members exceeds2GB, aggressive vacuum

storage occupied by multixacts members exceedsabout 10GB, aggressive vacuum

scans will occur more often for all tables, starting with those that

have the oldest multixact-age. Both of these kinds of aggressive

scans will occur even if autovacuum is nominally disabled.

scans will occur even if autovacuum is nominally disabled. The members storage

area can grow up to about 20GB before reaching wraparound.

</para>

<para>