[Dovecot] Process parameters tuning

[Angel L. Mateo]

Hi,

	I'm having problems with director and lmtp for delivering messages to 
my dovecot farm. Also I have a warning like this:

doveconf: Warning: service auth { client_limit=4096 } is lower than 
required under max. load (5048)
doveconf: Warning: service anvil { client_limit=1000 } is lower than 
required under max. load (2003)


	So I'm trying to tune processes parameters, but I haven't found a 
complete description of these parameters. All I've found are examples. 
Questions are about client_limit, service_count, process_limit and 
process_min_avail.

	I think that process_limit and process_min_avail are the maximum of 
running processes for a service and the minimuf of idle process, 
respectively.

	But I don't completely understand what exactly are client_limit and 
service_count,

	Service_count means how many times a process is reused. If you 
configure it as 1 means that every time a process ends its connections, 
it dies. If you configure as 0, when the connections ends, then the 
process remains idle waiting for new connections. Isn't it?

	But what does client_limit means? The number of clients that a process 
can handle? Then number that can handle concurrently? Can a process 
handle more than one client concurrently?

	The documentation at http://wiki2.dovecot.org/LoginProcess simply says:

* Otherwise new processes are created only once an existing one's 
connection count reaches client_limit
* Default client_limit * process_limit = 1000*100 = 100k connections

	Does this mean that a process handle a maximun of client_limit 
connections concurrently?

-- 
Angel L. Mateo Martínez
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