Re: MySQL issues with kernel-2.6.18-53.1.6.el5.x86_64.rpm

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Bent Terp wrote:
On 1/24/08, Karanbir Singh <mail-lists@xxxxxxxxx> wrote:
Bent Terp wrote:
Hi all!

Just a word of warning: after updating a few of our x86_64 based web
frontend boxes to the new kernel, we began to get weird MySQL
timeouts. The problem went away again when we downgraded to the
previous kernel-2.6.18-53.1.6.el5.x86_64.rpm

A bit more info / context would be nice !

We upgraded our web front servers to kernel 2.6.18-53.1.6, and
suddenly sites wouldn't load. It seemed to be that the connections
from php to the backend sql servers timed out, so we immediately
downgraded back to 2.6.18-53.1.4

Now that we've had more time to look at the problem, it is not related
to mysql, sorry about that. Rather, it looks as if the set of nfs
patches do not agree with our EMC Cellera NAS server. Backing out that
bunch and rebuilding makes the problem go away.

The patches that gives us problems, results in a kernel which makes
something like 2000 times more "NFS V3 LOOKUP Call" and "NFS V3 LOOKUP
Reply" than without.

Has something changed with regard to the mount options? We use
(rw,noatime,rsize=8192,wsize=8192,hard,udp,context="system_u:object_r:httpd_sys_content_t:s0)
which has worked fine until now.

I am trying to duplicate your options ... and noatime is not a valid option.

Could you please double check the /etc/export options again so I can try to duplicate the issue.

Using my standard /etc/exports on 2 i686 test platforms I have no problems at all.

Here are the options I used on my test:

(rw,insecure,sync,no_subtree_check)

Thanks,
Johnny Hughes

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