Ok I am answering my own question just incase someone also faces the same issue. Compile time option -with-filedescriptors is just a suggestion to squid. (as clarified by Amos) Earlier I was assuming that, it is enough and there is no need to set ulimit. But after few commands and Amos's reply, I realised we must set ulimit. Even after the WARNING by squid, squid was not actually increasing the limit. Before ulimit (1024/4096) and -with-filedescriptors=16384 cat /proc/SQUIDPID/limits Max open files 1024 4096 files After ulimit (16384/16384) and -with-filedescriptors=16384 cat /proc/SQUIDPID/limits Max open files 16384 16384 files In short, you still need to set ulimit. Here is how to do it on Fedora 1) Create file /etc/systemd/system/squid.service 2) Add following 3 lines in it. .include /lib/systemd/system/squid.service [Service] LimitNOFILE=16384 3) systemctl daemon-reload 4) systemctl restart squid.service Hope it helps Amm ----- Original Message ----- > From: Amm <ammdispose-squid@xxxxxxxxx> > To: "squid-users@xxxxxxxxxxxxxxx" <squid-users@xxxxxxxxxxxxxxx> > Cc: > Sent: Thursday, 14 February 2013 3:53 PM > Subject: Re: query about --with-filedescriptors and ulimit > >>> I compiled squid using --with-filedescriptors=16384. >>> >>> So do I still need to set ulimit before starting squid?
