Re: [squid-users] Re: Can't increase SQUID 3.0.25 File Descriptors

On Tue, 5 Oct 2010 20:55:31 +0300, Sergiu Tatar wrote:
> Hello Amos, i tried squid without "--disable-internal-dns" option and
> some website-s sometime it's loading sometimes not. What can be the
> problem? thanks

Can you point at any specifics that always fail? what your DNS stats are?
(squidclient mgr:idns)

Amos

>
> On Tue, Oct 5, 2010 at 1:45 AM, Amos Jeffries wrote:
>> On Mon, 4 Oct 2010 20:25:22 +0300, Sergiu Tatar wrote:
>>>> Hello... i use Squid 3.0.25 and i have a problem: i can't increase
>>>> file descriptors. I have been installed with 'ulimit -HSn 8192' but
>>>> it's starting with 1024 fd. The 'max_filedesc' is not recongnized on
>>>> squid.conf ... in /etc/init.d/squid i have been put the line
>>>> 'ulimit -HSn 8192' ...but it's starting with 8192 fd.
>>
>> 3.0 also needs to be built with the higher FD limit set before
>> ./configure. --with-filedescriptors was supposed to evade that need,
but
>> seems not to work on all systems.
>>
>>>>
>>>> I tried to use Squid 3.1.4 but performances are slow comparatively
>>>> with Squid 3.0.25
>>
>> 3.1 is 15-20% faster in basic benchmarking. I'd recommend figuring out
>> what the extra slowness is caused by and fixing that.
>> The newer version will do 2x DNS lookups than before (AAAA as well as
>> A),
>> and attempt to connect to IPv6 first. It's likely your connectivity is
>> poor
>> in one of these two protocols.
>>
>>>>
>>>> OS: Mandriva 2010.0 x86_x64
>>>> Squid : Version 3.0.STABLE25
>>>> configure options: '--enable-cache-digests' '--disable-icmp'
>>>> '--disable-delay-pools' '--enable-storeio=ufs,aufs'
>>>> '--enable-async-io' '--enable-poll' '--disable-ident-lookups'
>>>> '--prefix=/squid' '--enable-removal-policies=heap,lru'
>>>> '--with-filedescriptors=8192' '--disable-snmp'
>>>> '--enable-linux-netfilter' '--disable-internal-dns'
>>
>> "--disable-internal-dns" will be part of the slowness problem. It can
>> only
>> receive one DNS lookup at a time, blocking all requests while it waits
>> for
>> a response. Unless you have a very good reason to use the old helper
>> remove
>> this option from your build and use the internal DNS client.
>>
>> Amos
>>
>>
Received on Tue Oct 05 2010 - 22:47:51 MDT