I think I might have the answer... Your web server's file system is not likely to be fragmented while your mail server's file system is. Specifically, your mail server is constantly creating and destroying files in the spool directory and as a result can become wildly fragmented. This can result in the appearance of an "IO bound" condition --- low CPU and low throughput.
Take a peak at the file system with Diskeeper (or your favorite defrag utility) and I'll bet this turns out to be the problem. Hope this helps, _M ]-----Original Message----- ]From: [EMAIL PROTECTED] ][mailto:[EMAIL PROTECTED] Behalf Of Rasmus Aaen ]Sent: Monday, March 17, 2003 8:40 AM ]To: '[EMAIL PROTECTED]' ]Subject: [IMail Forum] OT: Disk performance measurement ] ] ]Hi all, ] ]Anybody got a link to a good reliable disk benchmark program. I'm currently ]trying to find out why it takes three times the time to zip logfiles on our ]Imail server than on a webserver with the same cpu/mem. The only real ]difference between the two machines is that the mailserver discs is ]SCSI/RAID1 while the webserver is plain SCSI. ] ]When I start the zip program on the webserver, the CPU usage averages 95% ]whil it's zipping logfiles. On the mailserver, the CPU is hovering ]about 15% ]- never higher. Strange..... ] ]Thanks ] ]/Rasmus ] ]------- ][Denne E-mail blev scannet for virus af Declude Virus] ][This E-mail was scanned for viruses by Declude Virus] ] ] ]To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html ]List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ ]Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ ] To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
