--On November 19, 2013 at 8:20:57 PM +0200 Покотиленко Костик <casper(a)meteor.dp.ua&gt; wrote: > Hi, > > In our 1 Master - several slaves environment master slapd sometimes > stucks in such condition that it takes minutes to get replay to simple > queries with no visible resource consumption on both: the slapd process > itself and the linux it is running on. > > Restarting slapd helps for several days. Today I have not been able to > restart it without kill -9 because of: > > slapd shutdown: waiting for 12 operations/tasks to finish > > Waited 5 minutes with no luck, kill -9, start. > > slapd: 2.4.28 > OS: Ubuntu 12.04.2 LTS > > I'm Ok with "try latest version", but it would be nice to have some > pointers (maybe bug in this version or error in configuration). I would definitely say upgrade to 2.4.38. One thing that particularly stands out from the Changes file: OpenLDAP 2.4.32 Release (2012/07/31) Fixed slapd-bdb/hdb cache hang under high load (ITS#7222) Generally, I would suggest getting a full gdb backtrace and looking at the output of db_stat -C A and db_stat -c when it is in this state, if it occurs again after running a current release.