[squid-users] Squid performance not able to drive a 1Gbps internet link

[Marcus Kool]

On 08/03/2016 10:27 AM, Amos Jeffries wrote:
> On 3/08/2016 9:45 p.m., Marcus Kool wrote:
>>
>>
>> On 08/03/2016 12:30 AM, Amos Jeffries wrote:
>>
>>
>>> If thats not fast enough, you may also wish to patch in a larger value
>>> for HTTP_REQBUF_SZ in src/defines.h to 64KB with a matching incease to
>>> read_ahead_gap in squid.conf. That has had some mixed results though,
>>> faster traffic, but also some assertions being hit.
>>
>> I remember the thread about increasing the request buffer to 64K and it
>> looked so promising.
>> Is there any evidence of setting HTTP_REQBUF_SZ to 16K is stable in 3.5.x?
>>
>
> It has not had much testing other than Nathan's use, so I'm a bit
> hesitant to call it stable. But just raising the 4KB limit a bit to 64K
> or less should not have much effect negative effect other than extra RAM
> per transaction for buffering (bumped x8 from 256KB per client
> connection to 2MB).

I am about to configure an array of squid servers to process 50 gbit of traffic
and the performance increase that Nathan originally reported is significant...
So if I understand it correctly, raising it to 16K in 3.5.20
will most likely have no issues.  I will give it a try.

Thanks
Marcus

> We got a bit ambitious and made the main buffers dynamic and effectively
> unlimited for Squid-4. But that hit an issue, so has been pulled out
> while Nathan figures out how to avoid it.
>
> Amos
>
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