[Dovecot] Increase /proc/sys/fs/inotify/max_user_instances

[Timo Sirainen]

On Thu, 2011-03-31 at 09:41 +0300, Adrian Stoica wrote:
> Hi
> 
> I allready have set 256 on max_user_instances , and in the log i keep 
> seeing
> Mar 28 10:08:44 mail dovecot: imap(some.username): Warning: Inotify 
> instance limit for user 98 (UID vmail) exceeded, disabling. Increase 
> /proc/sys/fs/inotify/max_user_instances

Note that kernel only sees vmail as the user for everyone.

> What can i do to resolve this issue ?

Increase it more!

> service imap {
>    process_limit = 2048

You can have a maximum of 2048 IMAP connections and every one of them
could be IDLEing and using one inotify instance. So set it to 2048.