Re: [PERFORM] Data Warehousing Tuning

2005-07-11 Thread Alexander Kirpa
>- Sun V250 server >- 2*1.3GHz Sparc IIIi CPU >- 8GB RAM >- 8*73GB SCSI drives >- Solaris 10 >- Postgres 8 >4) We moved the pg_xlog files off /data/postgres (disks 2-7) and into >/opt/pg_xlog (disks 0-1), but it seemed like performance decreased, >so we moved them back again. You have saturated SC

Re: [PERFORM] Data Warehousing Tuning

2005-07-06 Thread Josh Berkus
Paul, > Has anyone experienced real performance gains by moving the pg_xlog > files? Yes. Both for data load and on OLTP workloads, this increased write performance by as much as 15%. However, you need to configure the xlog drive correctly, you can't just move it to a new disk.Make sure

Re: [PERFORM] Data Warehousing Tuning

2005-07-06 Thread Frank Wosczyna
Hi Paul, just some quick thoughts: > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Paul Johnson > Sent: Wednesday, July 06, 2005 10:16 AM > To: pgsql-performance@postgresql.org > Subject: [PERFORM] Data Warehousing Tuni

[PERFORM] Data Warehousing Tuning

2005-07-06 Thread Paul Johnson
Hi all, we have the following setup: - Sun V250 server - 2*1.3GHz Sparc IIIi CPU - 8GB RAM - 8*73GB SCSI drives - Solaris 10 - Postgres 8 Disks 0 and 1 are mirrored and contain the OS and the various software packages, disks 2-7 are configured as a 320GB concatenation mounted on /data, which is w