[squid-users] squid occupying 100% cpu at free time also

Hi,

When i have heavy traffic that time squid always consume 100% cpu
utilization. Is there anyway to tune squid or OS to reduce cpu utilization?

When i remove traffic from router to squid means that time, there is no
traffic on squid box and that time also i can see same 100% cpu
utilization in top command. What could be the reason behind that? Does
squid occupied cpu usage even in there is no traffic?

OS: CENTOS 64 bit
squid -v
Squid Cache: Version 3.1.10
configure options: '--build=x86_64-unknown-linux-gnu'
'--host=x86_64-unknown-linux-gnu' '--target=x86_64-redhat-linux-gnu'
'--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr'
'--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'
'--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64'
'--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib'
'--mandir=/usr/share/man' '--infodir=/usr/share/info'
'--exec_prefix=/usr' '--libexecdir=/usr/lib64/squid'
'--localstatedir=/var' '--datadir=/usr/share/squid'
'--sysconfdir=/etc/squid' '--with-logdir=$(localstatedir)/log/squid'
'--with-pidfile=$(localstatedir)/run/squid.pid'
'--disable-dependency-tracking' '--enable-arp-acl'
'--enable-follow-x-forwarded-for'
'--enable-auth=basic,digest,ntlm,negotiate'
'--enable-basic-auth-helpers=LDAP,MSNT,NCSA,PAM,SMB,YP,getpwnam,multi-domain-NTLM,SASL,DB,POP3,squid_radius_auth'
'--enable-ntlm-auth-helpers=smb_lm,no_check,fakeauth'
'--enable-digest-auth-helpers=password,ldap,eDirectory'
'--enable-negotiate-auth-helpers=squid_kerb_auth'
'--enable-external-acl-helpers=ip_user,ldap_group,session,unix_group,wbinfo_group'
'--enable-cache-digests' '--enable-cachemgr-hostname=localhost'
'--enable-delay-pools' '--enable-epoll' '--enable-icap-client'
'--enable-ident-lookups' '--enable-linux-netfilter'
'--enable-referer-log' '--enable-removal-policies=heap,lru'
'--enable-snmp' '--enable-ssl' '--enable-storeio=aufs,diskd,ufs'
'--with-aufs-threads=128' '--enable-useragent-log' '--enable-wccpv2'
'--enable-esi' '--with-aio' '--with-default-user=squid'
'--with-filedescriptors=16384' '--with-dl' '--with-openssl'
'--with-pthreads' '--enable-zph-qos' '--enable-err-languages=English'
'--enable-default-err-language=English'
'build_alias=x86_64-unknown-linux-gnu'
'host_alias=x86_64-unknown-linux-gnu'
'target_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m64 -mtune=generic -fpie' 'LDFLAGS=-pie'
'CXXFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fpie'
--with-squid=/root/rpmbuild/BUILD/squid-3.1.10

We have Intel(R) Xeon(R) CPU E5504 @ 2.00GHz ( 4 core ).

Concurrent users are 2500-3000 users and bandwith usage is 250-300 Mbps.

We are using squid for only cache gain purpose.Does my squid configure
options are ok with my requirement or do i need to make changes with them?

Also please suggest me that my current processor is fine as per my
network traffic or suggest me better processor.

Regards,
Benjamin
Received on Tue Dec 20 2011 - 08:31:36 MST