Re: [squid-users] Multi processors

Sounds like you want processor affinity;
   http://www.linuxcommand.org/man_pages/taskset1.html

Cheers,

On 12/03/2008, at 8:22 AM, Marcos Camões Bourgeaiseau wrote:

> In parts:
>
> 1-"One of the most important things to check is that you have
> different
> PID's for every instance of squid, see "pid_filename"
> Sure. Otherwise you can't even start more than one process.
>
> 2-"Also, how many cpu's does that box have? Do you see squid always
> using the same one (I.E. CPU2)"
> Squid always use the same CPU, but others services (apache for
> exemple)
> in the same machine use all four CPUs, the Ubuntu itself uses the four
> CPUs. That I know, this problem only occurs with squid.
>
> More info: Each squid instance uses it own cache, have it own
> squid.conf
> file and listens in different ports.
>
> Thanks one more time,
>
> escreveu:
>> Marcos,
>>
>> Ubuntu should work fine with an SMP kernel for squid.
>>
>> Just to double check, with your setup have you followed these
>> guidelines?
>>
>> http://wiki.squid-cache.org/MultipleInstances
>>
>> one of the most important things to check is that you have
>> different PID's
>> for every instance of squid, see "pid_filename"
>>
>> Also, how many cpu's does that box have? Do you see squid always
>> using the
>> same one (I.E. CPU2)
>>
>> Saul W
>>
>> -----Original Message-----
>> From: Marcos Camões Bourgeaiseau [mailto:marcoscamoes@rio.rj.gov.br]
>> Sent: Tuesday, March 11, 2008 4:34 PM
>> To: saul waizer; squid-users@squid-cache.org
>> Subject: Re: [squid-users] Multi processors
>>
>> Sorry about that.
>> It is a Ubuntu Feisty with a re-compiled Kernel version 2.6.15.7. We
>> just took out some harware modules. We tried some newer Kernel but we
>> couldn't make it work with the hadware that we have here.
>> And just for clarity: It was OK to put four or more instances
>> running at
>> the same time, but all of those instances keep using the same
>> processor
>> and only that ONE processor. It is such a waste. And we have very
>> limited material to work here.
>>
>> Thanks again,
>>
>> saul waizer escreveu:
>>
>>> Marcos,
>>>
>>> What OS are you running squid on?
>>>
>>> According to the Docs, squid cannot take advantage of an SMP
>>> kernel but
>>> there is a reference about having multiple instances of squid
>>> running,
>>> However some OS's are very specific on how they handle processes,
>>> a little
>>> more information about your setup would be helpful
>>>
>>> Saul
>>> -----Original Message-----
>>> From: Marcos Camões Bourgeaiseau [mailto:marcoscamoes@rio.rj.gov.br]
>>> Sent: Tuesday, March 11, 2008 3:21 PM
>>> To: squid-users@squid-cache.org
>>> Subject: [squid-users] Multi processors
>>>
>>> I have compiled squid with those options below:
>>>
>>> squid -v
>>> Squid Cache: Version 2.5.STABLE12
>>> configure options: --sysconfdir=/etc/squid
>>> --enable-storeio=aufs,coss,diskd,ufs --enable-poll --enable-delay-
>>> pools
>>> --enable-linux-netfilter --enable-htcp --enable-carp --with-pthreads
>>> --enable-underscores --enable-external --enable-arp-acl
>>> --with-maxfd=16384 --enable-async-io=50 --enable-snmp
>>>
>>> It runs in a machine with 4 Itel Xeon processors, but squid no
>>> matter
>>> how many instances i start, uses only one processor, and my other
>>> three
>>> processors stay idle.
>>>
>>> My Squid.conf is this: (I have cutted-out my acls and http_acces)
>>>
>>> http_port 8080
>>> hierarchy_stoplist cgi-bin ?
>>> acl QUERY urlpath_regex cgi-bin aspx \?
>>> no_cache deny QUERY
>>>
>>> # OPTIONS WHICH AFFECT THE CACHE SIZE
>>> cache_mem 3072000 KB
>>> maximum_object_size 20000 KB
>>> minimum_object_size 0 KB
>>> maximum_object_size_in_memory 4 MB
>>> cache_replacement_policy lru
>>> memory_replacement_policy lru
>>>
>>> # LOGFILE PATHNAMES AND CACHE DIRECTORIES
>>> cache_dir ufs /var/spool/squid 5000 16 256
>>> cache_access_log /var/log/squid/access.log
>>> cache_log none
>>> cache_store_log none
>>> pid_filename /var/run/squid.pid
>>>
>>> # OPTIONS FOR EXTERNAL SUPPORT PROGRAMS
>>> ftp_list_width 32
>>> ftp_passive on
>>>
>>> auth_param basic children 5
>>> auth_param basic realm Squid proxy-caching web server
>>> auth_param basic credentialsttl 2 hours
>>> auth_param basic casesensitive off
>>>
>>> # OPTIONS FOR TUNING THE CACHE
>>> refresh_pattern ^ftp: 1440 20% 10080
>>> refresh_pattern ^gopher: 1440 0% 1440
>>> refresh_pattern . 0 20% 4320
>>> quick_abort_pct 98
>>>
>>> # MISCELLANEOUS
>>> append_domain .rio.rj.gov.br
>>> memory_pools_limit 50 MB
>>> log_icp_queries off
>>> snmp_port 3401
>>>
>>>
>>> Does anyone have an idea?
>>> I have looked up in this list old mails, and have not found
>>> anything.
>>>
>>> Thanks a lot,
>>>
>>>
>>
>>
>
> --
> Marcos Camões Bourgeaiseau - KIKO
> ================================================
> e-mail pessoal: mcbourgeaiseau@gmail.com
> e-mail institucional: marcoscamoes@rio.rj.gov.br

--
Mark Nottingham       mnot@yahoo-inc.com