Re: [PERFORM] wal_buffers

2005-10-07 Thread Josh Berkus
Ian, Thomas, > Thanks; I'd seen the documentation, but not Josh Berkus' > testing. BTW, that's still an open question for me. I'm now theorizing that it's best to set wal_buffers to the expected maximum number of concurrent write connections. However, I don't have enough test systems to test

Re: [PERFORM] wal_buffers

2005-10-06 Thread Alvaro Herrera
On Thu, Oct 06, 2005 at 08:56:31AM -0400, Ian Westmacott wrote: > On Thu, 2005-10-06 at 02:39, Thomas F. O'Connell wrote: > > The WAL Configuration chapter (25.2) has a pretty good discussion of > > how wal_buffers is used: > > > > http://www.postgresql.org/docs/8.0/static/wal-configuration.html

Re: [PERFORM] wal_buffers

2005-10-06 Thread Ian Westmacott
On Thu, 2005-10-06 at 02:39, Thomas F. O'Connell wrote: > The WAL Configuration chapter (25.2) has a pretty good discussion of > how wal_buffers is used: > > http://www.postgresql.org/docs/8.0/static/wal-configuration.html > > You might also take a look at Josh Berkus' recent testing on this

Re: [PERFORM] wal_buffers

2005-10-05 Thread Thomas F. O'Connell
On Oct 5, 2005, at 8:23 AM, Ian Westmacott wrote: Can anyone tell me what precisely a WAL buffer contains, so that I can compute an appropriate setting for wal_buffers (in 8.0.3)? I know the documentation suggests there is little evidence that supports increasing wal_buffers, but we are insert

[PERFORM] wal_buffers

2005-10-05 Thread Ian Westmacott
Can anyone tell me what precisely a WAL buffer contains, so that I can compute an appropriate setting for wal_buffers (in 8.0.3)? I know the documentation suggests there is little evidence that supports increasing wal_buffers, but we are inserting a large amount of data that, I believe, easily exc