[Simh] Excessive paging of the real machine running SIMH - VAX

Richard Davis richard_a_davis_2 at btinternet.com
Sat Jan 20 13:18:41 EST 2007


Hmmm....!

Further investigation using a filemon tool (determines what files are being
accessed and by what processes) shows that the VMS system disk (and any
other disk subsequently mounted) has a number of reads performed on it with
a transfer size of 4096 bytes (which all look pretty sensible) and then all
of a sudden the transfer size balloons to 65536 bytes and the read offset
continually increments right up to the maximum size of the virtual disk.
 





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