Memory Leak in LMREPL Service

ID: Q122838

3.10 3.50
WINDOWS
kbnetwork kbbug3.10 kbbug3.50 kbfix3.50.sp2

The information in this article applies to:

Microsoft Windows NT Advanced Server version 3.1
Microsoft Windows NT Server version 3.5

SYMPTOMS

The Directory Replicator Service (LMREPL) in Windows NT Server version 3.5 and Windows NT Advanced Server version 3.1 has a memory leak, which can slowly consume nonpaged pool resources and as a result, it can degrade system performance.

CAUSE

The leak appears to be located at the client side of LMREPL which wakes up each 15 minutes to perform a replication, depending on the results of a cyclic redundancy check (CRC). Each 15-minute pulse consumes approximately 1 kilobyte (K) of nonpaged pool.

WORKAROUND

Periodically, the Directory Replicator can be stopped and restarted to free the memory; this should be done at regular intervals (every two weeks or so) until a fix is available.

To monitor this resource, use Performance Monitor to look at Object <Process>, Instance <LMREPL>, Counter <Pool NonPaged Bytes>. The initial value should be approximately 9860 bytes and values larger than this can indicate a leak. Over a period of weeks, this value can grow to 3 megabytes (MB) or more.

STATUS

Microsoft has confirmed this to be a problem in Windows NT Advanced Server version 3.1 and Windows NT Server version 3.5. This problem was corrected in the latest U.S. Service Pack for Windows NT version 3.5. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):


   S E R V P A C K

Additional query words: prodnt 3.10 perfmon

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