HiFriends, I'm with a problem about memory fragmentation in a Server with Exchange 2000 with SP3, the Server has 4GB of memory, but the version of Windows is 2000 Server, and the parameter /3gb is not applicable, the event 9582 (memory fragmentation) appears every hour, I'm thinking in to up the size of cache database or set the register flagHeapDeCommitFreeBlockThreshold , but i'm not sure that is applicable at windows 2000 server. I need help if i could apply this or other solution for memory fragmentation at windows 2000 server. Thanks all.