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Poor performance - DFM database server

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Hi guys, can anyone shed some light on DFM database performance? We have 14 filers being monitored via DFM / OnCommand 5.0.0 running on a VM (MS Windows 2008 R2 SP1 - 64bit, 4 vCPU's and 10GB RAM).

Whenever I delete events from the DFM database the dbsrv10.exe process ramps right up and more occasionally than not an alert is generated in DFM saying that the "Management station load is too high". DFM then pretty much is unresponsive for up to 10 minutes.

Has anyone else had poor performance issues with DFM / server. Does the DFM database require some kind of cleanup or tuning? Current size of monitordb.db file is 13.2GB. Any advice much appriciated. Cheers Ian

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