Disk Performance - RH9 vs RHEL ES 3 (RESOLVED)

[Rigler, Steve]

Check out: http://rhn.redhat.com/errata/RHSA-2004-188.html

The part that grabbed my attention was:

  A significant change in the SCSI subsystem (the disabling
  of the scsi-affine-queue patch) should significantly improve
  SCSI disk driver performance in many scenarios. There were
  10 Bugzillas against SCSI performance problems addressed
  by this change.

-Steve

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com]On Behalf Of Greg Bradner
Sent: Friday, May 21, 2004 1:05 PM
To: General Red Hat Linux discussion list
Subject: Re: Disk Performance - RH9 vs RHEL ES 3 (RESOLVED)


Do you know what's different in the kernels?


Rigler, Steve wrote:

>We just loaded the errata kernel (2.4.21-15) and the performance
>looks good.  We're seeing 160MB/s write, 345MB/s re-write, 180MB/s
>read and 240MB/s re-read on the EMC array.
>
>It looks like this has resolved our problem!
>
>-Steve