Date: Tue, 09 Mar 2010 10:28:03 +0100 From: Giulio Ferro <auryn@zirakzigil.org> To: Daniel Braniss <danny@cs.huji.ac.il>, freebsd-stable@freebsd.org Subject: Re: Fwd: Re: NFS Client error Message-ID: <4B9614A3.4090404@zirakzigil.org> In-Reply-To: <E1NovW3-0002JF-Pg@kabab.cs.huji.ac.il> References: <4B960ADE.2070303@zirakzigil.org> <E1NovW3-0002JF-Pg@kabab.cs.huji.ac.il>
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On 09.03.2010 10:14, Daniel Braniss wrote:
>> Thanks for your kind reply, I'm forwarding it there...
>>
>>
>> -------- Original Message --------
>> Subject: Re: NFS Client error
>> Date: Mon, 08 Mar 2010 23:59:29 +0100
>> From: volker@vwsoft.com
>> To: Giulio Ferro<auryn@zirakzigil.org>
>> CC: freebsd-hackers@freebsd.org, freebsd-net@freebsd.org
>>
>>
>>
>> On 03/08/10 12:16, Giulio Ferro wrote:
>>
>>> Freebsd 8 stable amd64
>>>
>>> It mounts different file systems by NFS (with locking) on a
>>> data server directly connected (gigabit) to the server
>>>
>>> Apache running in a several jails on those nfs folders.
>>>
>>> Now and then I get huge slow-down. When I look in the logs
>>> I get thousand of lines like these:
>>> Mar 5 11:50:52 virt2 kernel: vm_fault: pager read error, pid 46487 (httpd)
>>> Mar 5 11:50:52 virt2 kernel: pid 46487 (httpd), uid 80: exited on
>>> signal 11
>>>
>>>
>>> What should I do?
>>>
> If the binary (httpd) is on a nfs server, then if the binary got
> modified this is what usualy happens
>
Nope. The binary is on the jails on the local machine.
Only the configuration dir (etc/apache22) and data dir (www)
in on the nfs server.
------------------------
|NFS CLIENT |
| jail 1 : httpd |
| jail 2 : httpd | ------> NFS SERVER
| jail 3 : httpd |
|... |
-----------------------
Giulio.
> my 2c
> danny
>
>
>> Giulio,
>>
>> it seems this is anyhow not related to network (nfs) operations. It's
>> looking like a problem in the VM. I think it makes sense to have a look
>> at the httpd.core file if the binary has been linked with debugging
>> symbols turned on. Also I think at first, it may not hurt to look at
>> vmstat -m output.
>>
>> You may want to change ${subject} and post to stable@ to drive more
>> attention to your problem.
>>
>> Volker
>>
>>
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>
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