Hi I installed squid 2.5.STABLE6 on Centos 4.4 I have a blacklist file, size more than 4 Megabytes acl in squid.conf look like acl porn url_regex -i "/etc/squid/porn" http_access deny porn When i started squid , /etc/init.d/squid start Stopping squid: .................................................. Starting squid: [FAILED] I give this error in /var/log/messages Mar 20 15:25:33 lnx squid[21380]: Squid Parent: child process 21382 exited withstatus 0 Mar 20 15:26:40 lnx squid[21709]: fork failed: (12) Cannot allocate memory Mar 20 15:26:40 lnx squid[21709]: Squid Parent: child process -1 started Mar 20 15:26:40 lnx squid[21709]: Squid Parent: child process -1 exited due to signal 68 Mar 20 15:26:43 lnx squid[21709]: Squid Parent: child process -1 started Mar 20 15:26:43 lnx squid[21709]: Squid Parent: child process -1 exited due to signal 68 Mar 20 15:26:46 lnx squid[21709]: Squid Parent: child process -1 started Mar 20 15:26:46 lnx squid[21709]: Squid Parent: child process -1 exited due to signal 68 Mar 20 15:26:49 lnx squid[21709]: Squid Parent: child process -1 started Mar 20 15:26:49 lnx squid[21709]: Squid Parent: child process -1 exited due to signal 68 Mar 20 15:26:52 lnx squid[21709]: Squid Parent: child process -1 started Mar 20 15:26:52 lnx squid[21709]: Squid Parent: child process -1 exited due to signal 68 When i removed porn file or porn file < 1 MB then squid work fine