ejabberd - Comments for "[New] history_size and other settings"

The muc_room table stores the

mfoss — Fri, 31 Jan 2014 12:45:49 +0000

The muc_room table stores the room information that changes infrequently: the room options.
The room information that is expected to change frequently, is kept only in the room process state: occupants, history, etc.
And the table muc_online_room allows to find the room process.

All this is for efficiency reasons.

One way to keep being efficient and still keep room history between service restarts would be to implement this feature request:
https://support.process-one.net/browse/EJAB-1145

Will it make any sense to

xmpp_noob — Fri, 31 Jan 2014 12:33:46 +0000

Will it make any sense to change the muc_room value to "Disk only"? Will this make any difference?

I think it measures number of

mfoss — Fri, 31 Jan 2014 12:30:50 +0000

I think it measures number of messages.

Room history is kept only in the room process state, that is in RAM. So, it's lost when the room gets recreated, and that happens when mod_muc is restarted.