The esteemed Adrian Doyle sent me some cool registry keys that can be used to control not only what is refreshed but how often it's refreshed within the OpsMgr 2007 admin console. Please note that we only recommend changing these values upon the advisement of Microsoft Product Support so use these at your own risk. In other words, always backup any registry key before making a change, know why you're making a change, and if you hose your system don't blame me.
Registry Key to control the number of objects to fetch Tasks/Reports:
TaskSelectedObjectsLimit DWORD value HKEY_CURRENT_USER\Software\Microsoft\Microsoft Operations Manager\3.0\Console
-1 (xFFFFFF) : unlimited number of objects allowed to be selected for fetching tasks/reports 0 : tasks/reports are not going to be populated for selected items in the view Integer value > 0 : maximum number of simultaneously selected objects for which tasks/reports are going to be generated. The default value is set to 10
Registry Keys for UI Refresh:
HKCU\Software\Microsoft\Microsoft Operations Manager\3.0\Console\EventQuery HKCU\Software\Microsoft\Microsoft Operations Manager\3.0\Console\AlertQuery HKCU\Software\Microsoft\Microsoft Operations Manager\3.0\Console\StateQuery
The following values can be added under those keys:
FullUpdate, DWORD = boolean value, 0 off, 1 on PartialUpdate, DWORD = boolean value, 0 off, 1 on
Event View/Alert View/State View are programmed to do auto updates. Partial Updates are every 15/30 seconds and Full Updates are every 5 minutes, thus when these views are left open they will be constantly fetching data from the Server based upon the values set.
J.C. Hornbeck | Manageability Knowledge Engineer
Source:  The Manageability Team Blog ======== Registry Key to control the number of objects to fetch
203 Microsoft Team blogs searched, 94 blogs have new articles in the past 7 days. 223 new articles found
What affect does the HCKU\Software\Microsoft\Microsoft Operations Manager\3.0\Console\CacheParameters\PollingInterval DWORD have then?