hanging imap with more then 120 connections

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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


-- 
   The only skills I have patience to learn are those that have no real
application in life.	  -- Calvin

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