On Mon, Nov 16, 2015 at 03:13:11PM +0000, Mark Cairney wrote: > We're having severe performance issues for any query with alias > dereferencing set to "always". > > Any query with this causes the CPU to spin up to 100% and if we have a > number of these concurrently the machine will become unresponsive.
I hit something similar a while ago using mdb: http://www.openldap.org/its/index.cgi/Software%20Bugs?id=8146 > We're using OpenLDAP 2.4.42 with the old hdb backend. > > We do have a large number of aliases (~63,000). Could this be the cause? It would be worth checking that you have indexed the objectclass attribute. I prefer to avoid aliases... Andrew -- ----------------------------------------------------------------------- | From Andrew Findlay, Skills 1st Ltd | | Consultant in large-scale systems, networks, and directory services | | http://www.skills-1st.co.uk/ +44 1628 782565 | -----------------------------------------------------------------------