[imp] New IMAP server, troubleshooting slow IMP performance

[Arjen de Korte]

Citeren Jens Wahnes <wahnes at uni-koeln.de>:

> Simon Wilson wrote:
>> $servers['imap']['cache'] = sql;
>>
>> I just switched it to nosql to use the mongo nosql setup on the  
>> server that is used for Horde cache - and the email times have  
>> dropped to about 0.5s.
>>
>> Thanks Jan, that was the ticket. I think nosql is probably better  
>> performance anyway?
>
> I'd say that using 'cache' = 'hashtable' is a safe bet, that is if  
> you are running memcached anyway.

On a lightly loaded server with a handful of users, I have never  
observed any appreciable difference between sql, nosql or hashtable.  
That is, if they are running on the same box as horde (all configured  
with ample memory). As soon as you hit connections to a different  
server and/or delays because data has to come from a spinning disk,  
the performance suffers, but other than that, no real difference.