Re: [squid-users] Poor Squid performance problem (bis!)

On 24 Aug 2001 18:15:48 +0200, GUIDOUX R InfoEdpEtcDep wrote:
> Hello,
>
> Does anyone have any idea about it ?
>
> sorry for this second mail, but I'm really blocked and I can't go on with
> using Squid if I can't get better performance !
> usually, when I perform these tests, caches are 100% CPU loaded. Here it is
> not even the case. I'd like to identify the (hard or soft) limitation and
> get rid of it.
>
> Any help will really be appreciated ...

Squid will typically need 3 fd's per 'hit'. 1 for the upstream socket, 1
for the downstream socket, and 1 for the store file.

So to handle 2000 concurrent connections, you need ~ 6000 fd's.

When you run ./configure squid TESTS your system to see how many fd's it
can obtain. You need to set your limits _before_ running ./configure or
else it will get limited to your user setting.

Rob

> Bye,
>
> Richard
>
>
>
> > -----Message d'origine-----
> >
> > Hello,
> >
> > i've got a little problem with Squid configuration tuning :
> >
> > I've got Squid 2.3 STABLE 3 under Solaris 8
> >
> > My server is quite powerful : Sun Fire E-280 with 2 procs & 1 Go Ram
> >
> > I want to have my squid deal as most simultaneous connections as possible
> > (for its tuning)
> >
> > To measure connections, I use little tool which send HTTP requests of 1k
> > cacheable pages to 'squid'
> > If it can help, here is my request : "GET http://192.xxx.xxx.xxx/1k.html/
> > HTTP/1.1"
> >
> > My problem is that I can't deal with more than 1000 'simultaneous hits'
> > (whereas I get more than 2000 with other caches of little size)
> >
> > I have checked CPU & Memory, it's OK :
> > I've got 30% Free on 1 CPU, and 60% on the other (besides, how does squid
> > deal with multi processors?)
> > Also, I've got more than enough RAM (or swap) free
> >
> > So, my question is : why not more than 1000 connections ?
> > Is it due to File Descriptors limitation ?
> > I have set Soft limit to 1024 and Hard Limit to 4096 (it seems that Squid
> > can't manage more than 1024 FD).
> > I use poll() method for file access.
> >
> > I'm almost sure there is one parameter i need to change, but I can't find
> > it (i've tried almost all Squid Tags)
> > here is my squid.conf file (it's really minimal ...)
> >
> > # NETWORK OPTIONS
> > http_port 3128
> > icp_port 0
> >
> > cache_effective_user squid
> > cache_effective_group squid
> >
> > cache_mem 500 MB
> >
> > maximum_object_size 4096 KB
> > minimum_object_size 0 KB
> >
> > # OPTIONS WHICH AFFECT THE LOGs
> >
> > pid_filename /usr/local/squid/logs/squid.pid
> >
> > cache_dir ufs /usr/local/squid/cache 2500 16 256
> > cache_log /usr/local/squid/logs/cache.log
> > cache_access_log /dev/null
> >
> > pid_filename /usr/local/squid/logs/squid.pid
> >
> > # OPTIONS FOR EXTERNAL SUPPORT PROGRAMS
> > ftp_passive on
> >
> > dns_children 5
> >
> > refresh_pattern . 5 20% 4000
> >
> > http_access allow All
> >
> > Any help will be greatly appreciated... !
> >
> > Bye,
> >
> > Richard.
> >
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Received on Fri Aug 24 2001 - 20:12:16 MDT