Hello, Does it make any sens to enable indexing of any attribute on read-only slave syncrepl replica? I mean, isn't it just waste of resources, or, actually, is not a waste a resources at all, since replica is read-only and does not write anything anyway? This, I think, apply to any version of openldap.
Indexing attributes has to do with how the slave is queried. So, it depends how well you want the replica to perform while it is being "read". If you have no clients that query the replica, then I agree, there is no reason to index anything on it. I will note that syncrepl itself acts as an internal client, and there are some indices on the replica that help sync replication perform more quickly. But how badly you want to slow your replica down is of course entirely up to you. :)
--Quanah -- Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration