[389-users] Re: howto retrieve backend cache statistics with mdb on 389ds 2.5.x ?

Hi,

On Fri, Jan 23, 2026 at 9:23 PM Bob Green via 389-users <389-users@lists.fedoraproject.org> wrote:

It seems if one configures 389ds 2.x instance with mdb backend, one
loses the ability to run "dsconf <instance> monitor dbmon", with
"Error: list index out of range".   This is a known issue:
https://github.com/389ds/389-ds-base/issues/6614 .

"dsconf <instance> monitor ldbm" appears to provide some of the same
information, in particular with normalizeddncachehitratio, but not
necessarily for the backend entry cache information, or am I mistaken?

Outside of upgrading to the latest version, is there an alternative
means of retrieving the same information that "monitor dbmon"
provides?  Or, should I stick to bdb until I get around to upgrading
to 389ds 3.x?

You can get monitor stats directly from the following entries:
cn=monitor,cn=ldbm database,cn=plugins,cn=config

cn=monitor,cn=YOUR_BACKEND,cn=ldbm database,cn=plugins,cn=config 

I.e. 

ldapsearch -xLLL -D 'cn=Directory Manager' -W -b 'cn=monitor,cn=ldbm database,cn=plugins,cn=config'

ldapsearch -xLLL -D 'cn=Directory Manager' -W -b 'cn=monitor,cn=userroot,cn=ldbm database,cn=plugins,cn=config'

HTH

This issue observed with:
% rpm -qi 389-ds|head -n3
Name        : 389-ds
Version     : 2.5.3~git144.95b15d57c
Release     : 150700.3.6.1

on  SLES15_sp7

% dsconf dev backend config get |grep nsslapd-backend-implement
nsslapd-backend-implement: mdb
% dsconf dev monitor dbmon
Error: list index out of range

Thanks,
Bob
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Viktor