Re: [HACKERS] high shared buffer and swap

2009-05-04 Thread Martijn van Oosterhout
On Mon, May 04, 2009 at 10:57:47AM +0200, Greg Stark wrote: > I think what's happening is that the sytem is seeing that some pages of > shared memory haven't been used recently and because there's more shared > memory than filesystem cache less recently than the filesystem cache > pages. So it p

Re: [HACKERS] high shared buffer and swap

2009-05-04 Thread Greg Stark
Sorry for top-posting - the iphone mail client sucks. I think what's happening is that the sytem is seeing that some pages of shared memory haven't been used recently and because there's more shared memory than filesystem cache less recently than the filesystem cache pages. So it pages out

[HACKERS] high shared buffer and swap

2009-05-04 Thread Laurent Laborde
Friendly greetings ! I found something "odd" (something that i can't explain) this weekend. An octocore server with 32GB of ram, running postgresql 8.3.6 Running only postgresql, slony-I and pgbouncer. Just for testing purpose, i tried a setting with 26GB of shared_buffer. I quickly noticed that