Christian Manal moenoel@informatik.uni-bremen.de writes:
Hi,
I've got a question regarding ACLs and their processing performance.
I use the NIS-schema to store userinformation and the likes in OpenLDAP (using the maps passwd, group, services, ethers, hosts, automount stuff etc.) plus samba-schema plus some self defined stuff.
I have ACLs defined for some special attributes, like userPassword, and for each OU (People, Groups, ...).
If I start multiple searches without a filter (so everythin accessible will be displayed) anonymously or with some user, I can get the CPU load of my servers up to 80-90%. It's definitely the ACLs, since I have no problems when using the rootDN or if I reduce the ACLs.
What I'd like to know now is, what is so damn expensive in my ACLs and how I could reduce the cost without lessening the access restrictions...
OpenLDAP version is 2.4.17 using back-hdb with BDB 4.4 from opencsw respository on Solaris 10 (SunOS 5.10 Generic_139556-08). There are around 30k entries in my database. I have one master and four slaves using delta-syncrepl for replication.
Configuration files can be found here:
You make use of sets quite heavily, regular expressions always require plenty of resources.
-Dieter