This article was previously published under Q309227
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When an Exchange 2000 server has less than 15 percent free disk space and is performing indexing, the server begins a master merge. If the hard disk drive is near capacity, the master merge begins and will consume one of the computer's processors.
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 2.
A master merge will be attempted every five minutes, and if the disk space remains above 85 percent, a server will spend virtually all of its time master merging instead of crawling. Therefore, the crawled index will become increasingly out-of-date, leading to data loss.