Author: Nico Erfurth Date: To: Michael Brutman CC: exim-users Subject: Re: [Exim] Some performance notes
Michael Brutman wrote:
....
> Everything scaled linearly up to 1 processor. (I was able to test at 0.25,
> 0.50, and 1.00 processor units.) Between 1 and 2 processors the scaling is
> no longer linear, but still tolerable. After 2 processors it runs very
> strangely - the CPU surges and ebbs in a cycle.
>
> If you have suggestions for fun & easy tests to run, let me know - I've got
> some playtime still left on the machine.
As usual, use split_spool_directory, some kind of local dns caching
(local dns server or nscd). But I think a real bottleneck is OpenLDAP.
But even here you can try to tweak a little bit, by using address_data
and named lists.
