1 Topic by ramiazul

  • ramiazul
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  • Registered: 2015-09-02
  • Posts: 2

Topic: Very high load average on mailserver

==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.8.7
- Linux/BSD distribution name and version:  Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-24-generic x86_64)
- Store mail accounts in: MySQL
- Web server: Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
====

There is a high load average on the mail server, all the time, this makes mail delivery slow taking from 40 minutes to up to 2 hours, even withing the same mail server.

Disabling spam assasin and amavis is not an option, because people complain about how much spam they got.

This machine has 4 cores and 8gb of RAM, so the mail server is really hungry, even with tiny amouts of mails inside (200 mails is enough to just freeze the server)

----

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 31,165

Re: Very high load average on mailserver

*) Find out which software are busy and eat most system resource.
*) Enable postscreen or DNSBL service to help reduce spam.
http://www.iredmail.org/docs/enable.postscreen.html

BTW, we offer paid support service if you need us:
http://www.iredmail.org/support.html

3 Reply by ramiazul

  • ramiazul
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Re: Very high load average on mailserver

This reduced the load from 4 to 3 if you are not using amavis.

when you disable the content_filter in /etc/postfix/main.cf and stop the amavis service the load is reduced from 22 to 3-5.

SO there should be a problem in the amavis configuration file

4 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
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  • Registered: 2009-05-06
  • Posts: 31,165

Re: Very high load average on mailserver

Could you please follow this tutorial to make sure you have correct concurrent setting in Amavisd + Postfix?
http://www.iredmail.org/docs/concurrent.processing.html

Also, hope this helps:
http://www.iredmail.org/docs/performance.tuning.html