DOCUMENT:Q176708 15-MAR-1999 [exchange] TITLE :XCON: Memory Leak in Microsoft Exchange Message Transfer Agent PRODUCT :Microsoft Exchange PROD/VER:5.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When a Microsoft Exchange Server is left running for a long period of time, it might run out of virtual memory due to a memory leak in the Microsoft Exchange message transfer agent (MTA). This can be observed using the Windows NT Performance Monitor, by checking the private byte counter of the Store process. If you see a steady increase over a few days, you are seeing this problem. Even though you are seeing a leak from Store, it is actually in the MTA. CAUSE ===== The MTA is not freeing allocated memory properly. The store is showing the problem because it is calling a function exported from the MTA. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Exchange Server, version 5.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.0. 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 ====================================================================== Keywords : Technology : kbExchangeSearch kbExchange500 kbZNotKeyword2 Version : 5.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.