[Dovecot] difference between client_limit and process_limit

[Timo Sirainen]

On 8.6.2012, at 19.33, Reindl Harald wrote:

>> Yes, but like the wiki page also says, it's not a good idea increase client_limit for imap/pop3 processes.
> 
> depends on the usecase / workload
> 
> having dovecot as proxy for other imap-backends and 1 process per connection
> will heavily raise up process-count and memory-overhead while memory
> may be needed for the imap-backend (like dbmail) and datanases
> 
> process_limit                = 15
> client_limit                 = 300
> 
> this way you can have 4500 proxy-connections and use most time
> not more than 4-5 processes

Proxying is done by imap-login process, not imap process. For login processes there are different recommendations.