*Conan The Librarian
The Monitor utility (MONITOR) is a system management tool used to obtain information about operating system performance. MONITOR allows you to monitor classes of systemwide performance data (such as system I/O statistics, page management statistics, and time spent in each of the processor modes) at specifiable intervals, and produce several types of output. To monitor a particular class of information, specify the class names corresponding to the information classes that you want to monitor. For example, to monitor page management statistics, specify the PAGE class name in the MONITOR command. MONITOR collects system performance data by class and produces the following three forms of optional output: o A disk recording file in binary format o Statistical terminal displays o A disk file containing statistical summary information in ASCII format The utility initiates a single MONITOR request for the classes of performance data specified each time you enter a command in the following form: MONITOR [/qualifier[,...]] classname[,...] [/qualifier[,...]] Regardless of the order in which you specify classname parameters, MONITOR always executes requests in the following sequence: PROCESSES STATES MODES PAGE IO FCP LOCK DECNET FILE_SYSTEM_CACHE DISK DLOCK SCS SYSTEM CLUSTER RMS MSCP_SERVER TRANSACTION VECTOR VBS (VAX Only) TIMER RLOCK Depending on the command qualifiers specified, MONITOR collects system performance data from the running system or plays back data recorded previously in a recording file. When you play back data, you can display it, summarize it, and even rerecord it to reduce the amount of data in the recording file. To invoke MONITOR, enter the DCL command MONITOR. $ MONITOR The utility then displays the following prompt: MONITOR> To begin monitoring a system, issue the Monitor utility MONITOR command. NOTE If you attempt to monitor a remote node that is incompatible, the system displays the following message: %MONITOR-E-SRVMISMATCH, MONITOR server on remote node is an incompatible version If you receive this message, contact your HP support representative for a remedial kit that corrects this problem. Before you install the remedial kit, you can still use MONITOR to obtain data about the remote node. To do this, record the data on the remote node, and then run the MONITOR playback feature to examine the data on the local node. Generally, each MONITOR request runs until the time specified or implied by the /ENDING qualifier. To exit from MONITOR, enter the EXIT command at the MONITOR> prompt or press Ctrl/Z. To terminate a MONITOR request without exiting from the utility, press Ctrl/C. Information that MONITOR collect is usually displayed as ASCII screen images. You can use the optional /DISPLAY qualifier to specify a disk file to contain the information. If you omit the file specification, output is directed to SYS$OUTPUT. See the Monitor utility MONITOR command for a discussion of the /DISPLAY qualifier. You can also initiate MONITOR requests from command level by entering the DCL command MONITOR with the desired qualifiers and parameters. However, in terms of conserving system resources, it is preferable to initiate requests in response to the MONITOR> prompt.
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