[Dovecot] Dovecot performance under high load (vs. Courier)

Ed W lists at wildgooses.com
Sat Jun 23 13:21:02 EEST 2012

On 23/06/2012 09:22, Wojciech Puchar wrote:
>>> Nearly all of them are non-caching. (I don't know of any caching ones.)
>> At least roundcube (v0.7.1 here) has some caching options:
>> ------------------[excerpt from roundcubes main.inc.php]-------------
>> // Type of IMAP indexes cache. Supported values: 'db', 'apc' and 
>> 'memcache'.
>> $rcmail_config['imap_cache'] = null;
>> // Enables messages cache. Only 'db' cache is supported.
>> $rcmail_config['messages_cache'] = false;
>> -------------------------[end]----------------------------------------
>> But I don't know, whether this is the sort of caching you are 
>> referring to.
> what's a point of caching imap, except your webmail service is not 
> locally connected (localhost or LAN) to imap server?

Asking for items 600-615 from a threaded list, sorted by something, can 
be an expensive operation, especially if you just asked for items 
585-600 a moment ago?


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