Re: [squid-users] Multi processors

It worked fine. All I have to do now is change the squid service
initialization script.

Thanks a lot.

Mark Nottingham escreveu:
> 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
>
>
>

-- 
Marcos Camões Bourgeaiseau - KIKO
================================================
e-mail pessoal: mcbourgeaiseau@gmail.com
e-mail institucional: marcoscamoes@rio.rj.gov.br