Log Message:
-----------
Dynamically set a lower bound on autovacuum nap time so that we don't rebuild
the database list too often.
Per bug report from Łukasz Jagiełło and ensuing discussion on
pgsql-performance.
Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.95 -> r1.96)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c?r1=1.95&r2=1.96)