Re: [exim] setup Exim to improve SMTP performance

Phil Pennock a écrit :
> On 2006-03-21 at 17:22 +0100, Olivier Bonvalet wrote:
>
>> Have I to set anything else to improve perf ?
>>
>
> Local DNS cache, or LDAP slave if using LDAP for lookups.
>
Ok. I already have a local DNS cache, and don't use LDAP.

> If doing many file lookups per recipient, consider building the data
> into CDB files for faster lookups.
>
mmm I forgot to say : recipients are not local at all, all emails are
for remote smtp servers.


> /var/log being a different filesystem from /var/spool/exim/ (not just
> for the hints).
>
mm Ok. I'll try this, and will set "noatime" option for /var/spool/exim too.

> Set split_spool_directory.
>
I was thinking it was needed only for ext2/ext3. For XFS and JFS too ?
And what about ReiserFS ?


> Look carefully at what happens with your exim Routers; are you
> spam-scanning the outgoing mail once, at submission, or once per
> recipient? If all mail sent to your mailing-list software is scanned
> for spam and malware, then you probably can skip the scanning on the
> resubmitted emails. Many "template" configurations route mail on a
> per-recipient basis to spam-scanning first, because they're not designed
> to deal with that degree of recipient fan-out.
There is not any spam filter or anti virus on this boxes. They are
dedicated for the mailing list :
just Exim which send emails to remote SMTP servers.

For the routers, the config is the "default".


Thanks

Olivier