From: "Duv Dek" <onur@ee.bilkent.edu.tr>
To: "Neil Horman" <nhorman@redhat.com>
Cc: <nfs@lists.sourceforge.net>
Subject: Re: NFS response time
Date: Wed, 26 Jan 2005 00:00:11 +0200 [thread overview]
Message-ID: <004101c50329$3e016b30$7889b38b@alpin> (raw)
In-Reply-To: 41F6BD96.4040409@redhat.com
Yes, it is program that we wrote. It is doing some mathematical
calculations, so it utilizes full CPU. Other linux programs are not getting
very slow when this program runs, but client computers sometimes wait half a
minute in order to reach a file on nfs server. Logging in to the client
computers take around 10 minutes. Normally it takes no more than 20 seconds.
I mean nfs is almost locking, but no other linux program is badly affected.
At least we should be able to give better priority nfs via renice but we
couldn't figure it out. Doing renice -20 to all root programs didn't make
nfs faster.
----- Original Message -----
From: "Neil Horman" <nhorman@redhat.com>
To: "Duv Dek" <onur@ee.bilkent.edu.tr>
Cc: <nfs@lists.sourceforge.net>
Sent: Tuesday, January 25, 2005 11:43 PM
Subject: Re: [NFS] NFS response time
> Duv Dek wrote:
>> Hi
>> We have a problem with our NFS server on Redhat 9. In case a program on
>> the server uses high CPU, the NFS clients almost lock and nfs stops
>> giving response until that program lowers its CPU usage. We tried to
>> increase the priority of nfsd deamons with renice, and also tried to
>> increase the number of nfsd threads, decreased the priority of the
>> program using high CPU with renice, but none of them worked. How can we
>> solve this problem so that nfs does not lock?
>>
> Have your tried to ascertain which process on your system is responsible
> (or most responsible) for the high CPU utilization?
>
> Neil
>
> --
> /***************************************************
> *Neil Horman
> *Software Engineer
> *Red Hat, Inc.
> *nhorman@redhat.com
> *gpg keyid: 1024D / 0x92A74FA1
> *http://pgp.mit.edu
> ***************************************************/
>
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next prev parent reply other threads:[~2005-01-25 22:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-25 21:40 NFS response time Duv Dek
2005-01-25 21:43 ` Neil Horman
2005-01-25 22:00 ` Duv Dek [this message]
2005-01-26 12:46 ` Neil Horman
-- strict thread matches above, loose matches on Subject: below --
2005-01-25 17:19 Duv Dek
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