The first graph certainly looks like a checkpointing issue.
On Wed, Nov 09, 2005 at 07:49:23PM +0100, Marcin Giedz wrote:
> Jim C. Nasby napisa??(a):
>
> >That link isn't working for me,
> >
>
> Uppssss sorry... now it should work OK.
>
> >but if you're seeing 'spikey'
> >performance I'd bet that you need to change the bg_writer settings to
> >make it more aggressive, especially if you're seeing performance drops
> >Every 5 minutes (assuming default checkpoint settings).
> >
> >
> >You might also want to up wal_buffers and maybe checkpoint_segments.
> >
> >
>
> OK many thanks, I will check.
>
>
> >On Wed, Nov 09, 2005 at 03:26:51PM +0100, Marcin Giedz wrote:
> >
> >
> >>Hello.
> >>
> >>
> >>I made some test comparing postgresql 8.0.4 based on two servers.
> >>
> >>Here is a link:
> >>http://85.128.68.44/
> >>
> >>
> >>From my point of view it seems like:
> >> - with opteron I found that it works very FAST periodicaly, why???
> >> Maybe I did something wrong or.....
> >> - xeon seems to work almost all time on the same level but has much
> >> less performance than opteron. Is it normal?
> >>
> >>Did anyone has similar tests/results?
> >>
> >>BR,
> >>Marcin
> >>
> >>---------------------------(end of broadcast)---------------------------
> >>TIP 9: In versions below 8.0, the planner will ignore your desire to
> >> choose an index scan if your joining column's datatypes do not
> >> match
> >>
> >>
> >>
> >
> >
> >
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo@postgresql.org so that your
> message can get through to the mailing list cleanly
>
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
