HP 3000 Manuals HP 3000 Manuals
Chapter 4 Commands: Additional Information Overview This chapter provides additional information to help you understand how certain HP GlancePlus commands function. Selecting Jobs, Sessions, and Processes (>, J, S, P, #) There are three methods to select the job, session, or process you want to monitor. The first method uses the Next Logical Display command character (>) to zoom in, with a single keystroke, on the process that consumed the most resource during the last interval. You cannot use it to select a job or session. For example, if you are displaying the Global or CPU Detail screen, this command will take you to the Process screen of the highest CPU consumer. If you are displaying the Filter screen, you will go to the Process screen of the highest CPU consumer in the group of processes you are monitoring. If you are displaying the Disc Detail screen, you will go to the Process Screen of the highest Disc Consumer. It provides you with a guided-analysis capability that lets you quickly pinpoint and analyze the top resource consumer. A second method uses the J, S, or P command character to select the job, session, or process to monitor. For example, if you enter an S, GlancePlus will prompt you for a session number. When you enter a valid session number, the Session screen will be displayed with information about the requested session. These three commands--J, S, and P--are mnemonic and require a single keystroke. A third method uses the Select softkey or the # command character. Once the appropriate identifier and its number are entered, the screen changes to show the details of a single job, session, or process. Batch jobs and sessions are identified by the letter J or S followed by their job or session number (Jnnnn or Snnnn). Processes are identified by the letter P followed by a process identification number or PIN (Pnnn). This method has the advantage of being available through a softkey. It also gives you the capability to select operating system processes (those not attached to a job or session) by entering SYS when prompted for a job, session, or process number. If no process matching the selection criteria can be found, the user is returned to the Global screen. For example, if you are monitoring a batch job that terminates, GlancePlus returns to the Global screen automatically. MPE Command (:) Use this command to enter a single command to be executed by MPE. This includes MPE, UDC, RUN, and implied RUN commands. The HP GlancePlus screen is suspended until the command completes and you press Return or Enter.
Hint You can issue subsequent commands after a single command is completed by simply entering a colon (:) in response to the prompt: Press RETURN to continue (or Enter a GLANCE command):.
Refresh Screen (R) Use this command to clear the current display and redraw it with updated information for the current interval. It is useful for solving the problem of a corrupted display by refreshing the display completely. All Processes (A) Use this command to produce a one-time screen display that lists all processes or applications, not just those that are interesting. It can be used with the Global, Job/Session, Workload, and Filter screens. Following the All Processes display, the screen returns to its previous method of displaying only interesting processes. Change Queue (Q) Use this command, if you have sufficient capability, to change the queue of a specific process or of all the processes associated with a specific job or session. A user with system manager (SM) capability can also change a process, or all the processes belonging to a job or session, to or from the B subqueue (BS). At the Enter new queue... prompt, an SM user can enter a specific number to set the priority at any number between 100 and 255, or enter B to set the priority at 100. The system manager can limit the use of this command to certain user capabilities by modifying the GlancePlus configuration file. See chapter 7 for information about customizing GlancePlus. The priority of a process (or process-related job/session) in a circular queue is placed initially at the base of the chosen queue and will vary within the queue limits. The priority of a process in a linear queue remains constant. Furthermore, a linear queue process will not relinquish the CPU for processes with lower priorities unless it must wait for another resource.
CAUTION Misuse of this command can degrade system operating efficiency significantly.
List Users of a File (U) Use this command to check the current file users on the system. Press U to initiate an on-screen request for the FILE.GROUP.ACCOUNT information for a particular MPE file. Based on that information, all users of the specified file are listed by process identification number (PIN), user logon, job or session number, and logical device number (Ldev). For example, this can be used to identify all users of a program file you want to replace.
NOTE MPE message files are not supported because of the special type of control blocks that govern access to them.
Zero Averages (Z) Use this command to reset the averages for CPU, Disc, and Memory to zero and recompute them beginning with the current interval values. These averages are shown on the screen in the column labeled avg and as an asterisk (*) in the horizontal bars. Previous Display (<) Use this command to return immediately to the display that was last active before you entered the current display. For example, if you examine a job on the Job screen then move to the Process screen for an in-depth look at a specific process, you can use the Previous Display (<) command to return to the Job screen. Next Logical Display (>) Use this command to move to the next logical display based on your current display. As discussed earlier in this chapter, the Next Display command provides a guided analysis capability you can use to zoom from the Global, CPU Detail, Disc Detail, or Filter screen to the Process Detail screen of the top consumer of resources. You can also use it to zoom from the Workload screen to the Filter screen to examine the group of application programs that consumed the most CPU during the last interval. The Next Display command is only valid when issued while one of the screens mentioned above is the current screen. Ninety-second Timeout on Command Prompts Some commands issue a prompt and wait for your response. Examples are the Set Option Values command and the MPE command. A ninety-second timeout is in effect for all GlancePlus prompts to insure that you do not get an excessive number of interesting processes due to a large time interval when the next screen is displayed. If you do not respond to a prompt in 90 seconds, GlancePlus will move you to the next screen or prompt. There are two exceptions. When you are in the Help subsystem or in the midst of executing an MPE command, GlancePlus does not have control of the terminal. Therefore, it cannot initiate a time out. It is recommended that you limit your time in these areas to a few minutes.