Logging region out of memory

[Pascal Gienger]

Marc Patermann wrote:
> Hi,
> 
> I have IMAPd 2.2.12 and BDB 4.2.52:
> 
> When I got:
> 
> Sep  2 11:28:39 rzhs199 local6:warn|warning lmtpunix[1171642]: DBERROR
> db4: Logging region out of memory; you may need to increase its size

Increase logging region size.

> I found DB_CONFIG in /mail/imap/
> 
> :/mail/imap # cat DB_CONFIG
> set_cachesize 0 8388608 8
> set_lg_regionmax 524288
> set_lg_bsize 2097152
> 
> and these files

The file DB_CONFIG has to be in the "db" subdirectory (/mail/imap/db in 
your case).
Be warned: Some parameters of DB_CONFIG also change the on-disk-format, 
so backup your db files before (after shutting down cyrus) and restart 
after your changes.

Don't delete "skipstamp" in this db directory as it is used by your 
skiplist databases.

Just a personal biased hint:
You should not use Berkeley DB for important data of your cyrus system. 
Berkeley has a very rapid random read performance which is important (in 
our case) with the duplicate delivery database (now 1,3 GB in size). But 
even that should be feasible with skiplist.

Pascal
-- 
Pascal Gienger
University of Konstanz, IT Services Department ("Rechenzentrum")
Electronic Communications and Web Services
Building V, Room V404, Phone +49 7531 88 5048, Fax +49 7531 88 3739