Date: Mon, 19 Jun 2006 11:16:16 -0500 From: Derek Ragona <derek@computinginnovations.com> To: "Travis Fitch" <travis@fitch.id.au>, <freebsd-questions@freebsd.org> Subject: Re: Sendmail and high kernel CPU utilisation Message-ID: <6.0.0.22.2.20060619111155.0253cc00@mail.computinginnovations.com> In-Reply-To: <200606190148.k5J1mfxY037157@kaur.zehym.com> References: <200606190148.k5J1mfxY037157@kaur.zehym.com>
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Travis,
This may be from someone mail bombing your server with large email
attachments. However, you should increase the logging by sendmail adding
or changing the sendmail option:
-O LogLevel=80
Usually this is set in /etc/rc.conf. I find 80 is pretty good for showing
a lot of detail. Then you can look in your sendmail log in
/var/log/maillog for what sendmail is actually doing.
Hope this helps.
-Derek
At 08:56 PM 6/18/2006, Travis Fitch wrote:
>Hello,
>
>I was hoping someone might be able to shed some light on an issue I am
>having with sendmail on FreeBSD 5.2.1 running on a Sun V120.
>
>If you look at the snippet from top you can see that several sendmail
>process are casing the kernel to use ~ 65% of the CPU. I am having some
>issues profiling what is causing this issue. You can also see the load is
>quite high.
>
>last pid: 72705; load averages: 12.22, 12.29, 12.00
>up 1+06:09:44 11:42:28
>86 processes: 14 running, 72 sleeping
>CPU states: 35.5% user, 0.0% nice, 64.5% system, 0.0% interrupt, 0.0%
>idle
>Mem: 148M Active, 104M Inact, 73M Wired, 520K Cache, 60M Buf, 131M Free
>Swap: 2057M Total, 102M Used, 1954M Free, 4% Inuse
>
> PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
>20958 root 122 0 23368K 5472K RUN 44:32 8.64% 8.64% sendmail
>62864 root 122 0 23432K 5528K RUN 10:45 8.54% 8.54% sendmail
>70522 root 122 0 23448K 5544K RUN 2:43 8.35% 8.35% sendmail
>91279 smmsp 122 0 12224K 3832K RUN 60:17 8.25% 8.25% sendmail
>66302 root 122 0 23392K 5472K RUN 8:36 8.25% 8.25% sendmail
>16850 root 122 0 23432K 5528K RUN 51:31 8.20% 8.20% sendmail
>66306 root 121 0 23448K 5528K RUN 8:34 8.11% 8.11% sendmail
>68330 root 121 0 23432K 5528K RUN 5:37 8.11% 8.11% sendmail
>51654 root 121 0 23392K 5472K RUN 16:40 8.06% 8.06% sendmail
>66377 root 121 0 23392K 5472K RUN 8:22 8.01% 8.01% sendmail
>69364 root 121 0 23432K 5504K RUN 3:50 8.01% 8.01% sendmail
>
>
>The other interesting thing is that a lot of the SMTP connections hang
>around for quite some time. These connection just keep building up and
>slowly bring the system to a crawl.
>
>correo:root# ps aux| grep -v grep | grep sendmail
>root 62864 8.0 1.1 23432 5528 ?? R 10:06AM 10:49.58 sendmail:
>k5J06CMN062864 mx02.globalcenter.net.au [203.89.192.35]: DATA (sendmail)
>root 66306 8.0 1.1 23448 5528 ?? R 10:18AM 8:38.72 sendmail:
>k5J0IoxC066306 omta02ps.mx.bigpond.com [144.140.83.154]: DATA (sendmail)
>root 66377 7.9 1.1 23392 5472 ?? R 10:20AM 8:26.25 sendmail:
>k5J0KHGa066377 vpn02.commandhub.net [203.89.202.122]: DATA (sendmail)
>root 20958 8.0 1.1 23368 5472 ?? R 5:14AM 44:36.44 sendmail:
>k5IJF2bd020958 [83.173.162.41]: DATA (sendmail)
>root 68330 8.0 1.1 23432 5528 ?? R 10:43AM 5:41.33 sendmail:
>k5J0hOAk068330 mx01.globalcenter.net.au [203.89.192.34]: DATA (sendmail)
>root 69364 8.0 1.1 23432 5504 ?? R 10:59AM 3:54.45 sendmail:
>k5J0xmg6069364 omta05ps.mx.bigpond.com [144.140.83.195]: DATA (sendmail)
>root 70522 8.0 1.1 23448 5544 ?? R 11:11AM 2:47.79 sendmail:
>k5J1BY7Y070522 mx01.globalcenter.net.au [203.89.192.34]: DATA (sendmail)
>root 66302 8.0 1.1 23392 5472 ?? R 10:18AM 8:40.20 sendmail:
>k5J0If8t066302 vpn02.commandhub.net [203.89.202.122]: DATA (sendmail)
>smmsp 91279 8.0 0.7 12224 3832 ?? Rs 4:01AM 60:20.92 sendmail:
>Queue runner@00:10:00 for /var/spool/clientmqueue (sendmail)
>root 16850 8.0 1.1 23432 5528 ?? R 4:30AM 51:34.91 sendmail:
>k5IIUaWm016850 [201.150.67.51]: DATA (sendmail)
>root 51654 8.0 1.1 23392 5472 ?? R 9:37AM 16:44.52 sendmail:
>k5INbbYo051654 vpn02.commandhub.net [203.89.202.122]: DATA (sendmail)
>root 91276 0.0 1.0 22928 5032 ?? Ss 4:01AM 0:03.05 sendmail:
>rejecting connections on daemon MSA: load average: 12 (sendmail)
>
>I have rebuilt the world and kernel to see if the resolves my issue, but
>alas no luck.
>
>Hopefully someone will be able to point be in the right direction.
>
>Regards,
>
>Travis
>
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>--
>This message has been scanned for viruses and
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--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
MailScanner thanks transtec Computers for their support.
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