There's an awful lot of information left out that would be very useful to help advise you. Restarting the postgres services on a daily basis is certainly nothing that's going to corrupt your data or hurt your system, PROVIDED that it is done correctly (ie: not killing the backend postmaster when something is happening, not hard-booting the system while a RAID card is trying to write its cache, etc.) However, I think you'd be postponing the problem. The better answer might be to define and resolve the issue. "Its performance is good but gradually going down?" Well, is this a dedicated database server? What O/S? What version of PG? Have you check out memory usage? 4GB seems a bit low for the amount of data you're using. In a similar environment, I've got 12GB, and from time to time I'm paging. If "nothing changed" (TRULY, that is), you're most likely finding that you're either CPU, memory, or I/O bound, and the most likely culprits are the last 2 unless you've suddenly started some massive queries that didn't happen a few weeks ago. Also, when was the last time you vacuumed the database(s)? Is auto-vac on? I know, I know, I'm not _supposed_ to have to perform a full vacuum and analyze on my databases with auto-vac on, but if I don't, I run into performance problems, so I do that once per week, myself. -----Original Message----- From: pgsql-admin-owner@xxxxxxxxxxxxxx [mailto:pgsql-admin-owner@xxxxxxxxxxxxxx] On Behalf Of S Arvind Sent: Monday, September 21, 2009 12:46 PM To: pgsql-admin Subject: Postgres restart Recently due to some problem(not yet diagnosed) , our DB server Postgres is getting very slow after few hours. We didnt changed any settings for 6 months , so we dont know y its happening suddenly in this week. Our data folder is 118GB with 160 DBs. System is 2 Quad core with RAM 4GB. In last two days when it was restarted its performance is good but gradually going down. So few planned to restart the posgres process daily. Is it advisable to restart server daily ? since daily we can have 30 mins downtime. Please advise is it advisable or not? -Arvind S "Many of lifes failure are people who did not realize how close they were to success when they gave up." -Thomas Edison -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
