Full_Name: Andrew Gray Version: 2.4.17 OS: Debian 5.0 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (131.216.14.1) On receiving LDAP queries with a pagedResultsControl (in this case with a size of 250), back-sql generates an extremely inefficient query for every iteration in the form of: SELECT DISTINCT ldap_entries.id,people.local_id,text('UNLVexpperson') AS objectClass,ldap_entries.dn AS dn FROM ldap_entries,people,ldap_entry_objclasses WHERE people.local_ id=ldap_entries.keyval AND ldap_entries.oc_map_id=1 AND upper(ldap_entries.dn) LIKE upper('%'||'%OU=PEOPLE,DC=UNLV,DC=EDU') AND ldap_entries.id>250 AND (2=2 OR (ldap_entries.id=ldap_entry_objclasses.entry_id AND ldap_entry_objclasses.oc_ name='UNLVexpperson')) (this repeats for id>250, id>500, id>750, etc. etc.) Ideally (IMO) there really should be a SQL LIMIT applied here, as in this case slapd gets back a few tens of thousands of rows on every iteration, and the memory usage explodes and eventually gets killed.