On Aug 27, 2013, at 10:15 AM, Golden Shadow <firas73...@yahoo.com> wrote:
> 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 OK, then the pauses in service by squid are due to the amount of time required to dump core to disk for such a large process. Please follow the instructions at http://wiki.squid-cache.org/SquidFaq/BugReporting to assist diagnosing the cause of the signal 11. Hope this helps, Guy > > > ----- 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
