hanging imap with more then 120 connections

[lst_hoe02 at kwsoft.de]

Zitat von Marcus Schopen <lists at localguru.de>:

> Hi,
>
> my cyrus/imap starts hanging (I get timeouts on port 143) whenever a
> user is connecting to 120 mailboxes from a single IP and holding these
> connections for some time. The machine (KVM, 4 GB RAM, 4x2,1 GHz CPU)
> doesn't have hight load or is swapping therefore I'm a little bit
> surprised about this behavior.
>
> SERVICES {
> ...
> imap	cmd="imapd -U 30" listen="imap" prefork=4 maxchild=100
> imaps	cmd="imapd -s -U 30" listen="imaps" prefork=4 maxchild=100
> ...
> }
>
> Would maxchild=150 solve it and would the work out with the given VM
> setup?
>
> Ciao
> Marcus

With maxchild=100 you can have at max 100 concurrent IMAP connections.  
If you need more you should raise this value. If your machine is able  
to handle this depends on what is actually done with this open  
connections and what other services compete for machine resources.

Regards

Andreas




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