Hi Guy, Thanks for your reply.
The guys who monitor the server say that the problem happened several times today but I can see in /var/log/messages just few log entries about squid coredumps, which were deleted for being corrupted! Today, I had one chance to inspect the problem when it happened and there was a coredump. Aug 27 12:00:58 proxy2 kernel: squid[13009]: segfault at e3d ip 000000000064d097 sp 00007fff1c23c5d0 error 6 in squid[400000+3d4000] Aug 27 12:05:33 proxy2 squid[6917]: Squid Parent: will start 1 kids Aug 27 12:05:33 proxy2 squid[6917]: Squid Parent: (squid-1) process 6920 started Aug 27 12:13:06 proxy2 abrt[6794]: Saved core dump of pid 13009 (/usr/sbin/squid) to /var/spool/abrt/ccpp-2013-08-27-12:00:58-13009 (5 1502256128 bytes) Aug 27 12:13:06 proxy2 abrtd: Directory 'ccpp-2013-08-27-12:00:58-13009' creation detected Aug 27 12:13:06 proxy2 squid[13006]: Squid Parent: (squid-1) process 13009 exited due to signal 11 with status 0 Aug 27 12:13:22 proxy2 abrtd: Sending an email... Aug 27 12:13:23 proxy2 abrtd: send-mail: fatal: parameter inet_interfaces: no local interface found for ::1 Aug 27 12:13:23 proxy2 abrtd: Error running '/bin/mailx' Aug 27 12:13:23 proxy2 abrtd: 'post-create' on '/var/spool/abrt/ccpp-2013-08-27-12:00:58-13009' exited with 1 Aug 27 12:13:23 proxy2 abrtd: Corrupted or bad directory '/var/spool/abrt/ccpp-2013-08-27-12:00:58-13009', deleting Aug 27 12:22:14 proxy2 squid[6917]: Squid Parent: (squid-1) process 6920 exited with status 0 Aug 27 12:23:44 proxy2 squid[7281]: Squid Parent: will start 1 kids Aug 27 12:23:44 proxy2 squid[7281]: Squid Parent: (squid-1) process 7284 started Best regards, Firas ----- Original Message ----- From: Guy Helmer <guy.hel...@palisadesystems.com> To: Golden Shadow <firas73...@yahoo.com> Cc: "squid-users@squid-cache.org" <squid-users@squid-cache.org> Sent: Tuesday, August 27, 2013 3:46 PM Subject: Re: [squid-users] Squid Pauses! On Aug 27, 2013, at 6:11 AM, Golden Shadow <firas73...@yahoo.com> wrote: > Hello Squid Users! > > I have a TPROXY server built with squid V. 3.3.7, which was compiled from > source. The server has 192 GB of RAM and 2 X 2.7 GHz CPUs, each with 12 > cores. but I'm running only one squid worker. At the moment, there are 17 > squid clients and the server is receiving 20025 http requests per minute. CPU > usage is 62%. Squid is consuming about 12 GB of memory at the moment. > > Traffic is being redirected to this TPROXY using WCCP. Each once in a while, > traffic redirection stops for about 5-10 minutes. When checking the WCCP > clients on my Cisco switch, I see there is no WCCP client! > > During this pause time, running "squidclient mgr:info" freezes endlessly and > does not return any results. Checking /var/log/squid/cache.log when this > pause happens does not show any strange logs. > > When this condition happened last time, I shutdown squid using "service squid > shutdown" and the init script reported that squid shutdown went well but > running "ps aux | grep squid" returned the following: > > root 6900 0.0 0.0 103244 852 pts/0 S+ 12:05 0:00 grep squid > root 13006 0.0 0.0 38964 392 ? Ss Aug23 0:00 squid -f > /etc/squid/squid.conf > squid 13009 63.1 25.0 50332228 49622116 ? Dl Aug23 3383:07 (squid-1) > -f /etc/squid/squid.conf > > As you see, the worker squid kid is in uninterruptible sleep state and it > remained in this state for a while. Even when squid seems to be working > properly, the worker process may be in uninterruptible sleep for a short > time, is this normal? > > Becuase squid worker process stayed in the uninterruptible sleep mode for > quite long, I tried to stop it using "squid -k shutdown", which failed with > the following: > squid: No running copy > > I'm wondering why this command is claiming "No running copy" while both the > parent and kid squid processes are running! Squid might be dumping core during that interval. Have you checked the cache.log and/or looked for coredump files in the coredump_dir? Guy
