Squid перестает загружать страницы через 1-1.5 дня после запуска

Прокси работал, а потом стал тормозить и перестал загружать некоторые сайты -броузеры говорят, что ждут ответа от сервера. Памяти свободной 1714624k free. Система не свопится.
При перезагрузке прокси снова работает нормально.

squid.conf

##################################### ACL ######################################

acl manager proto cache_object
acl all src 0.0.0.0/0.0.0.0
acl root_host src 192.168.2.199
acl localhost src 127.0.0.1/255.255.255.255
acl my src 192.168.2.0/24
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 9443 9080 563 15100 11001 11002
acl Safe_ports port 80        # http
acl Safe_ports port 21        # ftp
acl Safe_ports port 443 9443 9080 563 11001 11002 # https
acl Safe_ports port 70        # gopher
acl Safe_ports port 210        # wais
acl Safe_ports port 1025-65535    # unregistered ports
acl Safe_ports port 280        # http-mgmt
acl Safe_ports port 488        # gss-http
acl Safe_ports port 591        # filemaker
acl Safe_ports port 777        # multiling http
acl CONNECT method CONNECT

#Add or remove sites by REGEX in this file
acl bad_sites url_regex -i "/usr/local/squid/etc/bw.regex"
###############################################################################
##

######################## HTTP_ACCESS ##################################
#allow all to root/deny bad dst/allow my src/deny all
#http_access allow root_host
http_access deny bad_sites
http_access allow manager localhost
http_access deny manager
http_access allow my
http_access deny all

icp_access allow all
###############################################################


############# CACHE #############
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
cache allow all

cache_mem 120 MB
##################################

############# PATHS #################################
cache_dir ufs /usr/local/squid/var/cache 7000 16 256
access_log /usr/local/squid/var/logs/access.log squid
####################################################

############# SPECIAL PARAMETERS ################
refresh_pattern ^ftp:        1440&nbs...
refresh_pattern ^gopher:    1440    0%    1440
refresh_pattern .        0    20%    4320
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
cache_effective_user squid
cache_effective_group squid
log_access allow all

http_port 3128 transparent
reload_into_ims on
visible_hostname squid

______________

rc.squid

#!/bin/sh
# Start/stop/restart/reload the Squid Internet Object Cache (squid)
# To make Squid start automatically at boot, make this
# file executable:  chmod 755 /etc/rc.d/rc.Squid
#
# Written for Slackware Linux by Erik Jan Tromp
# Modified by David Somero <xgizzmo@slackbuilds.org>

SQUIDCFG=/usr/local/squid/etc/squid.conf
SQUIDCMD=/usr/local/squid/sbin/squid

if [ ! -r $SQUIDCFG ]; then
  echo "Please set the correct path to $SQUIDCFG"
  exit 1
fi

if [ ! -x $SQUIDCMD ]; then
  echo "$SQUIDCMD not found"
  exit 1
fi

squid_start() {
  # Create cache directory hierarchy if needed
  ALL_DIRS=$(awk '/^cache_dir/ {print $3}' $SQUIDCFG)
  [ -z "$ALL_DIRS" ] && ALL_DIRS=/usr/local/squid/var/cache/

  for CACHE_DIR in $ALL_DIRS ; do
    if [ ! -d $CACHE_DIR/00 ] ; then
      echo "Creating swap directories:  $SQUIDCMD -z"
      $SQUIDCMD -z 2> /dev/null
      break
    fi
  done

  echo "Starting Squid:  $SQUIDCMD -DF"
  $SQUIDCMD -DF
}

squid_stop() {
  COUNTDOWN=$(awk '/^shutdown_lifetime/ {print $2}' $SQUIDCFG)
  [ -z "$COUNTDOWN" ] && COUNTDOWN=30

  echo -n "Shutting down Squid in $COUNTDOWN seconds:  "
  $SQUIDCMD -k shutdown 2> /dev/null
  while [ $SQUIDCMD -k check 2> /dev/null ]
  do
     sleep 1
     echo -n .
     COUNTDOWN=$[ $COUNTDOWN - 1 ]
     if [ $COUNTDOWN -le 0 ] ; then
       $SQUIDCMD -k interrupt 2> /dev/null
       sleep 1
       break
     fi
  done
}

squid_restart() {
  squid_stop
  sleep 1
  squid_start
}

squid_reload() {
   $SQUIDCMD -k reconfigure 2> /dev/null
}

case "$1" in
'start')
  squid_start
  ;;
'stop')
  squid_stop
  ;;
'restart')
  squid_restart
  ;;
'reload')
  squid_reload
  ;;
*)
  echo "usage: $0 start|stop|restart|reload"
esac


___________________________________


cache.log после перезагрузки


2008/10/17 12:09:48| Done reading /usr/local/squid/var/cache swaplog (25092 entries)
2008/10/17 12:09:48| Finished rebuilding storage from disk.
2008/10/17 12:09:48|     24035 Entries scanned
2008/10/17 12:09:48|         0 Invalid entries.
2008/10/17 12:09:48|         0 With invalid flags.
2008/10/17 12:09:48|     24035 Objects loaded.
2008/10/17 12:09:48|         0 Objects expired.
2008/10/17 12:09:48|      1037 Objects cancelled.
2008/10/17 12:09:48|         0 Duplicate URLs purged.
2008/10/17 12:09:48|         0 Swapfile clashes avoided.
2008/10/17 12:09:48|   Took 0.3 seconds (93488.3 objects/sec).
2008/10/17 12:09:48| Beginning Validation Procedure
2008/10/17 12:09:49|   Completed Validation Procedure
2008/10/17 12:09:49|   Validated 22998 Entries
2008/10/17 12:09:49|   store_swap_size = 282004k
2008/10/17 12:09:49| storeLateRelease: released 0 objects
2008/10/17 12:10:02| CACHEMGR: <unknown>@127.0.0.1 requesting 'storedir'
2008/10/17 12:10:03| CACHEMGR: <unknown>@127.0.0.1 requesting 'counters'
2008/10/17 12:10:03| CACHEMGR: <unknown>@127.0.0.1 requesting 'counters'
2008/10/17 12:15:02| CACHEMGR: <unknown>@127.0.0.1 requesting 'storedir'
2008/10/17 12:15:03| CACHEMGR: <unknown>@127.0.0.1 requesting 'counters'
2008/10/17 12:15:03| CACHEMGR: <unknown>@127.0.0.1 requesting 'counters'