Re: [Qmail-scanner-general] qmail hangs for while
AV/content filter for Qmail
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From: Ed M. <EM...@te...> - 2007-10-05 20:14:51
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Changing your concurrency is going to depend on how you have installed qmai= l. The basics are to edit your svscan run script and modify the -c paramet= er of tcpserver to be the new concurrency level. If the install follows th= e life-with-qmail installation then you should have several files in your /= var/qmail/control directory called concurrencyincoming and concurrencyremot= e that contain the current values. Just echo a new value into the files an= d hup the services and all should be good. As for reiserfs, in all my testing the new versions of reiser were no where= near as fast as xfs and jfs. When running qmail with qmail-scanner and SA= you have A LOT of file io going on with creates, reads, and deletes. Reis= er uses a lot of cpu overhead in newer versions to handle this fast and tha= t can cause a high system load with qmail running, which automatically caus= es a lot of overhead. I love qmail to death and have been using it for yea= rs upon years, with that said though, it tends to cause higher than normal = system loads than say Postfix or Exim. On 10/5/07 1:36 PM, "Lampa" <la...@gm...> wrote: Hello, using SATA discs with software raid 1 (mirror) with reiserfs system. Spamassassin + scanned emails is on separate disc (system) and user mailboxes are on separate disc. I think that reiserfs should be good for that, but i want to migrate fo xfs. Maybe there is option to change concurency but in which way ? 2007/10/5, Ed McLain <EM...@te...>: > What kind of disk subsystem do you have? In my experience running qmail = with with a high concurrency of inbound emails on anything less than raid10= with either JFS or XFS for a filesystem is just asking for high load avera= ges and problems. One option you might think about is offloading the spama= ssassin daemon to a separate server to alleviate the overhead it imposes on= the system. This is easily done and can provide quite a nice improvement = in performance. > > > On 10/5/07 5:09 AM, "Lampa" <la...@gm...> wrote: > > Hello, > > i'm using toaster 0.8.3. Sometimes (one per week) i have problem that > my server hangs for minute or two. I've limit 50 connections for smtpd > (local 20 and remote 10), all 50 connections are used. Server load is > about 50 - 100 and mostly is not responding. I setup connections limit > (timeoutconnect - 20, timeoutremote - 60, timeoutsmtpd - 60) it helps > little (dropping spammers and peple who only block free connections). > Computer is core duo 2 6400@ 2.13GHz with 2G ram. Emails are on > separate disc. Discs are sata with sw raid (mirror) using reiserfs > (need migrate to xfs). There is nothing unusual in logs (except no > activity for minute or two) - no errors, qmail is accepting > connections. > > After this "timeout" spamassassin takes long time to process emails. > > Where can be problem ? Weak CPU, bad power source, bad settings ? > > Qmail is compiled with conf-spawn =3D 509, conf-split=3D101. Qmail-scanne= r > using st patch, using fast spamassassin. Spamassassin is 3.2.1. OS > Debian testing > > Any advices welcome, thank you or help. > > Lampa > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Qmail-scanner-general mailing list > Qma...@li... > https://lists.sourceforge.net/lists/listinfo/qmail-scanner-general > > > > -- > Ed McLain > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Qmail-scanner-general mailing list Qma...@li... https://lists.sourceforge.net/lists/listinfo/qmail-scanner-general -- Ed McLain |