Re: [exim] High Perf server

On Thu, Jun 30, 2005 at 04:55:42PM +0100, Tony Finch wrote:
> On Thu, 30 Jun 2005, Michael Haardt wrote:
> >
> > I am using tmpfs for hints. I will try no_message_logs, but as I
> > said: Removing the fsync() calls already helps a lot, probably by
> > avoiding disk transfers for messages that are delivered and deleted
> > right after being received.
>
> Indeed, though you should expect to lose quite a lot of email if the
> machine goes down unexpectedly.

That's why I don't do it for production, but just for analysis. :-)

> Alto try the noatime mount option on your spool directory.

That's already there since the beginning, but again: Whatever is not
fsync()ed, but subject to lazy writeback, is way cheaper, because
multiple modifications are combined.

Michael