Re: [squid-users] Multi processors

Tue, 11 Mar 2008 16:03:13 -0700 

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:[EMAIL PROTECTED]
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:[EMAIL PROTECTED]
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
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e-mail institucional: [EMAIL PROTECTED]


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Mark Nottingham       [EMAIL PROTECTED]

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