*/etc/squid/squid.conf:

icp_port 0
htcp_port 0
hierarchy_stoplist cgi-bin ?
cache_swap_low  90
cache_swap_high 95
maximum_object_size 4096 KB
ipcache_size 1024
ipcache_low  90
ipcache_high 95
fqdncache_size 1024
cache_access_log /var/log/squid/access.log
cache_dir ufs /var/cache/squid 240000 32 256
cache_log /var/log/squid/cache.log
cache_mem 3000 MB
cache_store_log /var/log/squid/store.log
emulate_httpd_log off
mime_table /etc/squid/mime.conf
log_mime_hdrs off
useragent_log none
pid_filename /var/run/squid.pid
log_fqdn off
client_netmask 255.255.255.255
ftp_user Squid@
ftp_list_width 32
refresh_pattern         ^ftp:           1440    20%     10080
refresh_pattern         ^gopher:        1440    0%      1440
refresh_pattern         .               0       20%     4320
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl SSL_ports port 443 563
acl Safe_ports port 80 21 443 563 70 210 1025-65535
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
# allow cachemgr protocol for SqStat - Anfang:
acl webserver src 172.16.68.170/255.255.255.255
http_access allow manager webserver
# allow cachemgr protocol for SqStat - Ende
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow all
icp_access allow all
miss_access allow all
# wenn "TrendMicro ISVW6" -> "Squid" -> "Internet"
# Vorteil:
# evtl Viren-kontaminierter Squid-cache wird immer mit aktuellsten Pattern gescannt
# http_port 8080
#--- TrendMicro InterScan Viruswall als Parent-Proxy Spezial-Config-Anfang:
# wenn "Squid" -> "TrendMicro ISVW6" -> "Internet"
# Vorteil:
# genaues Monitoring wer, wann welche Seiten angeschaut hat
http_port 8585
cache_peer 127.0.0.1 parent 8080 7 no-query default
never_direct allow all
server_persistent_connections off
forwarded_for on
log_mime_hdrs on
#--- TrendMicro InterScan Viruswall als Parent-Proxy Spezial-Config-Ende

Squid dies as soon as the access.log file gets to 2GB, with the following error message:

FATAL: logfileWRite: /usr/local/squid/var/logs/access.log:(0) Success.

/etc/logrotate.d/squid:

/var/log/squid/cache.log {
  compress
  dateext
  maxage 365
  rotate 99
  size=10M
  notifempty
  missingok
  create 640 squid root
  postrotate
  /etc/init.d/squid reload
  endscript
}

/var/log/squid/access.log {
  compress
  dateext
  maxage 365
  rotate 99
  size +100M
  notifempty
  missingok
  create 640 squid root
  postrotate
  /etc/init.d/squid reload
  endscript
}

/var/log/squid/store.log {
  compress
  dateext
  maxage 365
  rotate 99
  size=10M
  notifempty
  missingok
  create 640 squid root
  postrotate
  /etc/init.d/squid reload
  endscript
}

or: (???)

 "/var/log/squid/access.log" {
 rotate 5
 mail [email protected: w...@my.org]
 size=100k
 sharedscripts
 postrotate
 /sbin/killall -HUP squid
 endscript
 }