[Dovecot] 0.99.10.x auth memory leak?

[Christian Balzer]

Hello,

running 0.99.10.6 (but seen it before that, too). Also (quite obviously)
running 5 auth processes, given the fact that this is a pretty busy
box and I didn't want to introduce any artificial bottlenecks. 
Alas with them eating up half of the free memory (which would go to
a much better use as FS cache) I'm getting sorta concerned. 
If it's not a leak, it's caching something rather needlessly and
inefficiently (the LDAP DB memory footprint for ALL users is less
than this and the box below just serves half of those).
This box sees about 0.5 million POP3/IMAP logins/day.
---
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
31235 root      16   0  220m 216m 5560 S  0.0 10.7  25:01.54 dovecot-auth
31234 root      16   0  205m 202m 5560 S  0.0 10.0  24:08.84 dovecot-auth
31231 root      16   0  200m 196m 5560 S  0.7  9.7  23:25.37 dovecot-auth
31232 root      16   0  196m 192m 5560 S  0.0  9.5  23:10.44 dovecot-auth
31233 root      15   0  179m 175m 5560 S  0.3  8.6  22:13.07 dovecot-auth
---

So, I guess my questions to Timo are:

Think it's leaky and any idea where?

Given the load, would a single auth process be a bad idea?
(it is a quite fast dual opteron box)

Regards,

Christian Balzer
-- 
Christian Balzer        Network/Systems Engineer                NOC
chibi at gol.com   	Global OnLine Japan/Fusion Network Services
http://www.gol.com/