Re: qmail hangs for while

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 <[email protected]>:
> 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 averages and problems.  One option you might think about is offloading the spamassassin 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" <[email protected]> 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 = 509, conf-split=101. Qmail-scanner
> 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
> [email protected]
> 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/