[Dovecot] dovecot evaluation on a 30 gb mailbox

[Timo Sirainen]

On 25.6.2010, at 1.37, Noel Butler wrote:

> If its running on a SOHO, you probably wouldn't even be able to measure
> the difference, but for an ISP/Telco or large institution, you will
> certainly notice the reduction in I/O (or loads on your database
> server). This goes for any imap webmail software, not just SM.

But with auth cache enabled, there is no extra database load. The index files are also most likely in OS's cache (assuming local disk), so no extra disk I/O to read them either. I'm sure it's a bit more extra CPU usage, but I'm not all that certain that it's really that a big of a difference with Dovecot.