7. Using Monitoring and Tracing Tools : Operating System Utilities : VMS Operating System Utilities : monitor
 
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monitor
The VMS monitor utility returns dynamic information about VMS system performance for a specified component. Some of the most useful components to monitor are:
monitor system -- monitors system statistics
monitor process/topcpu--monitors the process currently using the most CPU
monitor process/topdio--monitors the processes that use the most disk I/O
monitor process/topbio--monitors the processes that use the most buffered I/O
monitor process/topfault-- monitors the processes that cause the most page faults
monitor pool--monitors non-paged pool statistics