Re: [PERFORM] Clarification on some settings

2004-05-13 Thread Greg Copeland
On Thu, 2004-05-13 at 14:42, Doug Y wrote: > We don't seem to be swapping much: > Linux aggressively swaps. If you have any process in memory which is sleeping a lot, Linux may actively attempt to page it out. This is true even when you are not low on memory. Just because you see some swap s

Re: [PERFORM] Clarification on some settings

2004-05-13 Thread Doug Y
(Sorry if this ends up being a duplicate post, I sent a reply yesterday, but it doesn't appear to have gone through... I think I typo'd the address but never got a bounce.) Hi, Thanks for your initial help. I have some more questions below. At 05:02 AM 5/12/2004, Shridhar Daithankar wrote: Dou

Re: [PERFORM] Clarification on some settings

2004-05-13 Thread Mark Kirkwood
Note that effective_cache_size is merely a hint to that planner to say "I have this much os buffer cache to use" - it is not actually allocated. It is shared_buffers that will hurt you if it is too high (1 - 25000 is the usual sweet spot). best wishes Mark Shridhar Daithankar wrote: Increa

Re: [PERFORM] Clarification on some settings

2004-05-13 Thread Neil Conway
On Wed, 2004-05-12 at 05:02, Shridhar Daithankar wrote: > I agree. For shared buffers start with 5000 and increase in batches on 1000. Or > set it to a high value and check with ipcs for maximum shared memory usage. If > share memory usage peaks at 100MB, you don't need more than say 120MB of buf

Re: [PERFORM] Clarification on some settings

2004-05-12 Thread Shridhar Daithankar
Doug Y wrote: Hello, I've been having some performance issues with a DB I use. I'm trying to come up with some performance recommendations to send to the "adminstrator". Hardware: CPU0: Pentium III (Coppermine) 1000MHz (256k cache) CPU1: Pentium III (Coppermine) 1000MHz (256k cache) Memory: 3

[PERFORM] Clarification on some settings

2004-05-11 Thread Doug Y
Hello, I've been having some performance issues with a DB I use. I'm trying to come up with some performance recommendations to send to the "adminstrator". Hardware: CPU0: Pentium III (Coppermine) 1000MHz (256k cache) CPU1: Pentium III (Coppermine) 1000MHz (256k cache) Memory: 3863468 kB (4 GB)