Red Hat Bugzilla – Bug 12873
NFS Server performance loss with 14-12 kernel
Last modified: 2008-08-01 12:22:51 EDT
Summary: Severe NFS Server performance loss when upgrading from
2.2.14-6.0.1 to 2.2.14-12.
We are running a RedHat 6.2-based NFS file server serving the
following types of clients: Solaris 2.7, IRIX 6.2, HP-UX 11.0, AIX
3.4.3, Dec/Alpha OSF1 V4.0, and Redhat 6.1 and 6.2. After upgrading
to kernel 2.2.14-12 we have had to revert back to kernel 2.2.14-6.0.1
due to significant NFS Server performance loss which disappeared
immedately upon rebooting the 14-6 kernel and reappeared consistently
when using 14-12. Nothing else other than the kernel was changed in
the environment, so it would appear that the source is a change
introduced in the 14.12 kernel.
The RedHat 6.2 NFS file server is running on a Dell Dimension XPS T600
with 128MB of RAM. The network uses LinkSys 10/100 workgroup switches
Performance of other networking operations (such as FTP) was unaffected
by the different kernels; only NFS was affected.
Opps. That should read AIX 4.3.3 (not 3.4.3!)...
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem
The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases,
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/