See below for description of lazy commit for clarification.
TIA
Micha
Lazy Commit control. Used with any of the operations that modify or add entries.
This control allows a client to tell AD to postpone writing the results of the operations to disk,
and to just store them in cache.
This control allows a client to make a large number of changes without any loss of performance due to disk writes
and therefore optimizes large changes.
However, if the directory server crashes before the cache is written, the changes are lost.
The OID 1.2.840.113556.1.4.619 specifies this control.