On Wed, 2006-05-10 at 09:55 -0700, Mark Wong wrote:
> Simon Riggs wrote:
> > Could you turn full_page_writes = off and do a few more tests? I think
> > the full page writes is swamping the xlog and masking the performance we
> > might see for normal small xlog writes.
> > I'd try XLOG_BLCKSZ = 4096 and 8192 to start with. Thanks.
>
> Ok, got data for XLOG_BLCKXZ at 4096, 8192, and 32768 with
> full_page_wirtes = off. The new data is at the bottom of the page:
> http://developer.osdl.org/markw/pgsql/xlog_blcksz.html
Mark,
What do you think is causing the step changes at 30+ and 60+ minutes on
these tests?
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com