thx a lot for your reply. i think it is measured in GB *free* total used free shared buffers cached Mem: 65992668 64425924 1566744 0 196932 62767468 -/+ buffers/cache: 1461524 64531144 Swap: 33554424 2105664 31448760 *top * top - 17:10:32 up 84 days, 8:23, 2 users, load average: 2.09, 2.12, 2.09 Tasks: 568 total, 5 running, 563 sleeping, 0 stopped, 0 zombie Cpu(s): 7.0%us, 1.6%sy, 0.0%ni, 90.9%id, 0.1%wa, 0.0%hi, 0.5%si, 0.0%st Mem: 65992668k total, 65484676k used, 507992k free, 200644k buffers Swap: 33554424k total, 2105608k used, 31448816k free, 63781976k cached -- View this message in context: http://postgresql.1045698.n5.nabble.com/system-is-swapping-not-actively-why-tp5116515p5117416.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com. -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin