IMAP hibernate feature committed

[Timo Sirainen]

On 26 Aug 2015, at 13:33, Thomas Leuxner <tlx at leuxner.net> wrote:
> 
> With this I see messages like this in the logs:
> 
> Aug 26 09:48:06 nihlus dovecot: imap-hibernate(tlx at leuxner.net): Connection closed in=189 out=4252 hdr=0 body=0 del=0 exp=0 trash=0
> Aug 26 12:20:29 nihlus dovecot: imap-hibernate(tlx at leuxner.net): Connection closed in=109 out=4714 hdr=0 body=0 del=0 exp=0 trash=0

So hibernation is at least sometimes used. Here the IMAP client got disconnected while IDLEing.

> I'm a bit puzzled as to when hibernate actually kicks in because most of the time I see normal imap processes running without them being hibernated:
> 
> $ ps aux | grep dovecot/imap
> vmail     8157  0.0  0.0  45624  9608 ?        S    12:01   0:00 dovecot/imap
> dovenull  8158  0.0  0.0  18332  4628 ?        S    12:01   0:00 dovecot/imap-login
> vmail     8159  0.0  0.0  44772  9256 ?        S    12:01   0:00 dovecot/imap
> dovenull  8160  0.0  0.0  18196  4652 ?        S    12:01   0:00 dovecot/imap-login
> vmail     8161  0.0  0.0  46072  9760 ?        S    12:01   0:00 dovecot/imap
> dovenull  8162  0.0  0.0  18196  4548 ?        S    12:01   0:00 dovecot/imap-login
> dovenull  8279  0.0  0.0  18332  4736 ?        S    12:22   0:00 dovecot/imap-login
> vmail     8280  0.0  0.0  40712  5164 ?        S    12:22   0:00 dovecot/imap
> dovenull  8341  0.0  0.0  18196  4740 ?        S    12:25   0:00 dovecot/imap-login
> vmail     8344  0.0  0.0  46312 10568 ?        S    12:25   0:00 dovecot/imap

Set verbose_proctitle=yes and you'll see what the imap processes are doing. It'll show IDLE in the ps output if the client is IDLEing. Although it doesn't say how long the client has been doing it.