Microsoft KB Archive/182505

= XADM: Memory Usage of Store.exe Is Higher in Exchange 5.5 =

Article ID: 182505

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q182505



SUMMARY
When you run Microsoft Exchange Server version 5.5, memory usage of Store.exe as viewed from Task Manager Processes may be considerably higher than in previous versions of Microsoft Exchange Server.



MORE INFORMATION
In versions earlier than Microsoft Exchange Server 5.5, memory over 256 MB was not used. With version 5.5, memory up to 3 GB can be used and is used, as is evident in the Task Manager Processes.

Exchange Server 5.5 uses all available RAM for the best performance possible, unless memory usage is limited by using the Exchange Performance Optimizer. Exchange Server will release memory to other applications as required to increase system performance.

As per the Exchange Server 5.5 Readme.doc:

  Significant changes were made to the database engine allowing Microsoft Exchange Server to better use large memory and multiple processor servers. In particular, Performance Optimizer will set the maximum number of information store and directory database buffers to much higher values than before (approximately the amount of available RAM  divided by 4K).

Keywords: kbinfo kbusage KB182505

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