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Will keeping Activity Monitor running in the background make me incur a significant performance hit? I know things like top in unix (if refreshed often) can use up 100% of the CPU. I ask because I leave it running to monitor my memory usage throughout the day. I often run low on free memory (less than 300MB free) on a 4GB MBP.
atMonitor is also good. http://www.atpurpose.com/atMonitor/
– neoneye – 2010-07-21T12:26:04.673