imapd -U in cyrus.conf

[Dave McMurtrie]

Peter Clark wrote:
> Hello all,
> 
> Not really understanding the -U (reuses) flag, is there an advantage to 
> using it? I imagine that there is in some specific instances so I better 
> ask the question differently. When would it be advantageous to use the 
> -U flag in cyrus.conf?
> 
> ie:
>   imap          cmd="imapd -U 60" listen="imap" prefork=6

If process creation is expensive on your system, it's good to reuse an 
existing imapd process as many times as possible to avoid the fork() 
overhead.

If there's a bad memory leak in imapd, you'd want it to exit often and 
have a new one be spawned so you don't exhaust virtual memory on your 
system.

hth,

Dave
-- 
Dave McMurtrie, SPE
Email Systems Team Leader
Carnegie Mellon University,
Computing Services