thx a lot for your advice. it's true that even under load, i havent seen any so or si...so probably it's best to let the OS handle the situation. in the meantime if anyone has any idea why the OS would do such a thing, pls share it with us. thx -- View this message in context: http://postgresql.1045698.n5.nabble.com/system-is-swapping-not-actively-why-tp5116515p5122796.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