varnish is using all file descriptors

[Darvin Denmian]

Maybe the following link can help you :
http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files/


On Mon, Jun 20, 2011 at 5:08 PM, Vince <cooltechemail at gmail.com> wrote:
>
> We are using CentOS 5.6 64-bit
> I'll try set it to a higher number. Do we need to turn any kernel parameters if we set it to a really high number, say 1M, on CentOS?
> However, a higher number doesn't mean we have found the problem. Our varnish server is serving about 300-400 requests per second. When it runs ok we checked /proc/PID/fd and it uses less than 100 file descriptors. But when it goes wrong all 65536 file descriptors have been used. Is this normal?
> Thank you!
>
> On Tue, Jun 21, 2011 at 4:02 AM, Per Buer <perbu at varnish-software.com> wrote:
>>
>> On Mon, Jun 20, 2011 at 9:31 PM, Vince <cooltechemail at gmail.com> wrote
>> > Hi,
>> > We had a problem with our varnish server recently that sometimes the server
>> > will use all file descriptors available to it, which is set to 65536, and
>> > start refusing connections. I am wondering how to find out what's the real
>> > problem behind it.
>>
>> Why the insanely low number? Out of the box my laptop has over half a
>> million. With 2minutes timeout for reuse on a tcp socket you would run
>> of sockets in a jiffie - oh, wait, that's what happening. :-)
>>
>> I would set up waaaay up. FD's are really cheap. You could start to
>> tune your TCP stack and/or reduce the number of Varnish threads but
>> unless you are on a embedded system I wouldn't do it.
>>
>> --
>> Per Buer, CEO
>> Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / Skype: per.buer
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>