Is there a large cache on the SAN - perhaps it was memory that was written to and not disk? Did you consider not striping the redo on the internal disk?
Cheers, Craig. -----Original Message----- Sent: Friday, 28 March 2003 11:44 AM To: Multiple recipients of list ORACLE-L Stephane Paquette wrote: > Same here, the SAN (Hitachi) is configured raid 5 (with 128K strippes i > think) and it's good for everything : Oracle, Sql Server, Novell, Windows, > AIX and maybe the mainframes if they live long enough. > > So I would not be wellcomed if I asked how about putting those redo logs on > raid 0+1 ? > > > Stephane > The funny thing is, we just got a Hitachi san raid 5 and I decided to put the redo logs on 5 striped internal disk on the host(sun V880) because I didn't want them on the raid 5 disk on the sam do to the heavy writes. Well, those internal disks were a huge bottleneck during some load tests for our datawarehouse(they are fibre channel on the new sun fire v880's), so we moved them to the SAN and it tripled the performance. Go figure. -Brian -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Brian Haas INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Craig Munday INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
