Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-11 Thread Richard Huxton
Karim Nassar wrote: Thanks to all for the tips. On Thu, 2005-03-10 at 09:26 -0600, John A Meinel wrote: How critical is your data? How update heavy versus read heavy, etc are you? Large, relatively infrequent uploads, with frequent reads. The application is a web front-end to scientific research

Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-10 Thread John Arbash Meinel
Karim Nassar wrote: Thanks to all for the tips. ... In general I would recommend RAID1, because that is the safe bet. If your db is the bottleneck, and your data isn't all that critical, and you are read heavy, I would probably go with RAID1, if you are write

Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-10 Thread Karim Nassar
Thanks to all for the tips. On Thu, 2005-03-10 at 09:26 -0600, John A Meinel wrote: > How critical is your data? How update heavy versus read heavy, etc are you? Large, relatively infrequent uploads, with frequent reads. The application is a web front-end to scientific research data. The scienti

Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-10 Thread Mario Weilguni
Am Donnerstag, 10. März 2005 08:44 schrieb Karim Nassar: > From rom http://www.powerpostgresql.com/PerfList/ > > "even in a two-disk server, you can put the transaction log onto the > operating system disk and reap some benefits." > > Context: I have a two disk server that is about to become dedica

Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-10 Thread John A Meinel
Karim Nassar wrote: From rom http://www.powerpostgresql.com/PerfList/ "even in a two-disk server, you can put the transaction log onto the operating system disk and reap some benefits." Context: I have a two disk server that is about to become dedicated to postgresql (it's a sun v40z running gentoo

Re: [PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-10 Thread David Brown
Karim Nassar wrote: Context: I have a two disk server that is about to become dedicated to postgresql (it's a sun v40z running gentoo linux). What's "theoretically better"? 1) OS and pg_xlog on one disk, rest of postgresql on the other? (if I understand the above correctly) 2) Everything stripe

[PERFORM] What's better: Raid 0 or disk for seperate pg_xlog

2005-03-09 Thread Karim Nassar
From rom http://www.powerpostgresql.com/PerfList/ "even in a two-disk server, you can put the transaction log onto the operating system disk and reap some benefits." Context: I have a two disk server that is about to become dedicated to postgresql (it's a sun v40z running gentoo linux). What's "