Re: [squid-users] Squid does not respond to TCP SYN when there are thousands of connection

On 02/15/2013 11:11 AM, dahanhsi wrote:
>>
>> There you go then. Squid is not permitted to _use_ more than 1651 FD. Every
>> client TCP connection uses at least 1, sometimes 2 FD.
>> When all the FD are used up Squid waits until some are free'd before
>> accepting more client connections.
>>
>> With "from 4651 to 9404" I would set your max_filedescriptors to at least
>> 18000. It can be anything up to the ulimit max.
> I set max_filedescriptors to 655360, and confirm that ulimit -n is also 655360.
> After restart Squid, I observe that rate of connection timeout in
> client is still about 10%, and no additional error such as
> filedescriptors error found in cache.log or dmesg.
>
> any ideas?
> thanks
>

ulimit -n must be run as the same user that the proxy is running.

In debian/ubuntu that user is proxy, and if you type ulimit as root you
will get a different answer that if you type ulimit logged in as proxy user.

Be sure to check the ulimit for the right user.
Received on Fri Feb 15 2013 - 15:16:46 MST