Re: [squid-users] upgrading from squid 2.6 to 2.7

On Sun, 29 Jun 2008, Adrian Chadd wrote:

> On Sun, Jun 29, 2008, Manoj_Rajkarnikar wrote:
>
>> I see that there is an option to specify the number of threads for aufs.
>> What is the optimum number of threads / what is the default number that
>> squid uses?? can it be altered to have effect on squid performance??
>
> The optimum number of threads depends entirely on your situation.
> It can be altered (and it should be a runtime tunable if it isn't! anyway..)
> and having too many threads can result in your Squid performing poorly -
> not because there's so many threads, but because it luls Squid's internal
> code into thinking the disk system can handle much more of a load than it
> can.

In my situation, I have only one cache that handles about 14 Mbits of
intercepted traffic on 2 x 36GB scsi disks. Linux is on a separate sata
disk. CPU is a P4 with HT enabled. I can see 2 aio processes. I assume
those are the asyncio threads I currently have. Please correct me if I'm
mistaken.

>
> Bringing some kind of sanity to performance tuning storage is something
> I'd like to spend some time doing but my free time is all booked up
> at the moment, sorry. :0
>

We've seen tremendous increase in performance from 2.5 to 2.6/2.7. all
credit goes to the squid dev team and to some extent, the user community
bringing in patches and ideas. people are benefiting from it alot. Cheers...

Manoj

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