Note: Mac OS X 10.4.9 seems to fix the bug described here.
pmTool, the process run by Activity Monitor to actually collect stats, appears to leak memory. If I leave Activity Monitor running for a good period of time, when I check up on it
pmTool is often using over 100MiB of Real Memory.
I just checked my laptop,
pmTool was using over 100MiB of Real Memory. Right now on my desktop it’s using 41MiB of Real Memory, but I don’t remember how long it’s been running for. I also believe a good deal of memory is currently paged out.
After checking up on it,
pmTool on my desktop has a Private Memory size of 91MiB.