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@xxxxxxxxxxxxxx so that your > message can get through to the mailing list cleanly > -- Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
