[Dovecot] Connection queue full on 2.0.8

[Timo Sirainen]

On 14.12.2010, at 21.38, Thomas Hummel wrote:

> On Tue, Dec 14, 2010 at 07:45:58PM +0000, Timo Sirainen wrote:
>>> Is there a way/rule of thumb to guess the appropriate value ?
> 
>> No idea :) vsz_limit=0 will at least always work, with the possibility of a
>> memory leak eating all your memory. Maybe set it to 1 GB or so. It's anyway
>> better to set it too high than too low to avoid killing existing connections
>> when vsz_limit is exceeded.
> 
> Just to be sure : what is that vsz_limit exactly to begin with ?

It's used to set RLIMIT_DATA, and also RLIMIT_AS in operating systems that support that, with setrlimit() call. http://linux.die.net/man/2/setrlimit

Basically kernel enforces that the process won't be using too much memory.