[squid-users] optimize squid

hi

I'd like to optimize according to this webpage

http://www.linux-faqs.com/squid.php

my squid 2.6.STABLE5 installed on Debian Etch (PC 4, 2GHz, 2GB RAM)
for about 150 users.

I should put the following two lines:

ulimit -HSn 8192 echo 1024 32768 > /proc/sys/net/ipv4/ip_local_port_range

in /etc/init.d/squid, but I don't know where exactly.

my /etc/init.d/squid:
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
#! /bin/sh
#
# squid Startup script for the SQUID HTTP proxy-cache.
#
# Version: @(#)squid.rc 2.20 01-Oct-2001 miquels_at_cistron.nl
#
### BEGIN INIT INFO
# Provides: squid
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Should-Start: $named
# Should-Stop: $named
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Squid HTTP Proxy
### END INIT INFO

NAME=squid
DAEMON=/usr/sbin/squid
LIB=/usr/lib/squid
PIDFILE=/var/run/$NAME.pid
SQUID_ARGS="-D -sYC"

[ ! -f /etc/default/squid ] || . /etc/default/squid

. /lib/lsb/init-functions

PATH=/bin:/usr/bin:/sbin:/usr/sbin

[ -x $DAEMON ] || exit 0

grepconf () {
   w=" " # space tab
   sq=/etc/squid/squid.conf
   # sed is cool.
   res=`sed -ne '
      s/^'$1'['"$w"']\+\([^'"$w"']\+\).*$/\1/p;
      t end;
      d;
      :end q' < $sq`
   [ -n "$res" ] || res=$2
   echo "$res"
}

grepconf2 () {
   w=" " # space tab
   sq=/etc/squid/$NAME.conf
   # sed is cool.
   res=`sed -ne '
      s/^'$1'['"$w"']\+[^'"$w"']\+['"$w"']\+\([^'"$w"']\+\).*$/\1/p;
      t end;
      d;
      :end q' < $sq`
   [ -n "$res" ] || res=$2
   echo "$res"
}

#
# Try to increase the # of filedescriptors we can open.
#
maxfds () {
   [ -n "$SQUID_MAXFD" ] || return
   [ -f /proc/sys/fs/file-max ] || return 0
   [ $SQUID_MAXFD -le 4096 ] || SQUID_MAXFD=4096
   global_file_max=`cat /proc/sys/fs/file-max`
   minimal_file_max=$(($SQUID_MAXFD + 4096))
   if [ "$global_file_max" -lt $minimal_file_max ]
   then
      echo $minimal_file_max > /proc/sys/fs/file-max
   fi
   ulimit -n $SQUID_MAXFD
}

start () {
   cdr=`grepconf2 cache_dir /var/spool/$NAME`

   case "$cdr" in
      [0-9]*)
         log_failure_msg "squid: squid.conf contains 2.2.5 syntax -
not starting!"
         log_end_msg 1
         exit 1
         ;;
   esac

   #
    # Create spool dirs if they don't exist.
    #
   if [ -d "$cdr" -a ! -d "$cdr/00" ]
   then
      log_warning_msg "Creating squid spool directory structure"
      $DAEMON -z
   fi

   if [ "$CHUID" = "" ]; then
      CHUID=root
   fi

   maxfds
   umask 027
   cd $cdr
   start-stop-daemon --quiet --start \
      --pidfile $PIDFILE \
      --chuid $CHUID \
      --exec $DAEMON -- $SQUID_ARGS < /dev/null
   return $?
}

stop () {
   PID=`cat $PIDFILE 2>/dev/null`
   start-stop-daemon --stop --quiet --pidfile $PIDFILE --name squid
   #
   # Now we have to wait until squid has _really_ stopped.
   #
   sleep 2
   if test -n "$PID" && kill -0 $PID 2>/dev/null
   then
      log_action_begin_msg " Waiting"
      cnt=0
      while kill -0 $PID 2>/dev/null
      do
         cnt=`expr $cnt + 1`
         if [ $cnt -gt 24 ]
         then
            log_action_end_msg 1
            return 1
         fi
         sleep 5
         log_action_cont_msg ""
      done
      log_action_end_msg 0
      return 0
   else
      return 0
   fi
}

case "$1" in
    start)
   log_daemon_msg "Starting Squid HTTP proxy" "squid"
   if start ; then
      log_end_msg $?
   else
      log_end_msg $?
   fi
   ;;
    stop)
   log_daemon_msg "Stopping Squid HTTP proxy" "squid"
   if stop ; then
      log_end_msg $?
   else
      log_end_msg $?
   fi
   ;;
    reload|force-reload)
   log_action_msg "Reloading Squid configuration files"
   start-stop-daemon --stop --signal 1 \
      --pidfile $PIDFILE --quiet --exec $DAEMON
   log_action_end_msg 0
   ;;
    restart)
   log_daemon_msg "Restarting Squid HTTP proxy" "squid"
   stop
   if start ; then
      log_end_msg $?
   else
      log_end_msg $?
   fi
   ;;
    *)
   echo "Usage: /etc/init.d/$NAME {start|stop|reload|force-reload|restart}"
   exit 3
   ;;
esac

exit 0
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Piotr
Received on Tue Jun 16 2009 - 14:53:35 MDT