Re: Monitoring back-mdb's olcDbMaxSize

["Michael StrÃder" <michael@stroeder.com>]

On Thu, 19 Dec 2013 17:28:27 +0100 Hallvard Breien Furuseth
<h.b.furuseth@usit.uio.no> wrote

> On 2013-12-19 16:46, Michael StrÃder wrote:
> > So when monitoring OpenLDAP with back-mdb it would be interesting to 
> > see how
> > much space of configured olcDbMaxSize is already occupied.
> > 
> > Does it make sense to compare the real file size shown by du -h
> > /path/to/data.mdb to configured olcDbMaxSize?
> 
> That would depend on the filesystem supporting holes
> in files, which sounds OS- and filesystem-dependent.

Currently I'm only interested in ext4 on Linux.

> The fill ratio is
> (MDB_envinfo.me_last_pgno + 1.0) * MDB_stat.ms_psize / 
> MDB_envinfo.me_mapsize
> from mdb_env_info() and mdb_env_stat().
> Inconvenient formula though.  Oh well.

Would be good to have this in cn=monitor:

http://www.openldap.org/its/?findid=7770

Ciao, Michael.