Re: [squid-users] How to debug slowness ?

On 16/08/2012 9:54 p.m., Yucong Sun (叶雨飞) wrote:
> Hi,
>
> I've compiled and use 3.2.1 today, however I notice under high
> concurrent request, my server is showing some slowness in the request
> start, much like a sceniaor that it only allow X concurrent request
> and all rest are blocking until it get schedule, so, any idea what
> might cause this and is there some knob to tune or how to debug such
> slowness?

Check your FD limitations. The above behaviour is exactly how Squid
handles FD exhaustion.
cache.log will be recording a "running out of filedescriptors" or
similar message under peak traffic.

Amos
Received on Thu Aug 16 2012 - 10:11:49 MDT