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— Utilities —

Invoking and Operating SYSBPM

The functions of the SYSBPM utility always refer to Natural objects currently loaded in the Natural buffer pool and/or BP cache. Note that the buffer pool or BP cache only contains executed Natural objects that have been stowed or cataloged. Objects executed with the RUN command are not loaded into the buffer pool or BP cache.

You can choose a function code or a PF key from a SYSBPM menu to execute a SYSBPM function. Alternatively, you can use a SYSBPM direct command as described in the relevant section.

This section describes how to invoke the SYSBPM utility, obtain online help text and select functions by using the SYSBPM Main Menu. The functions are described in detail in the relevant sections of the SYSBPM documentation.

In addition, information is provided on using SYSBPM in a z/OS Parallel Sysplex environment.

This section covers the following topics:

Invoking SYSBPM
Online Help
SYSBPM Main Menu - Fields, Functions and Commands
SYSBPM in a z/OS Parallel Sysplex Environment

Invoking SYSBPM

To invoke the SYSBPM utility

Enter the following Natural system command:

SYSBPM

A SYSBPM Main Menu similar to the example below appears:

 16:12:23             ***** NATURAL SYSBPM UTILITY *****             2002-08-27
 BPNAME QA41GBP                 - Main Menu -                   Type Global Nat
 BPPROP OFF                                                       Loc DAEF QA41
                                                               Preload QA41GBPL
                                                                               
            Object Functions                Object Pool Statistics             
                                                                               
            L  List Objects                 A  Buffer Pool                     
            D  Delete Object                C  BP Cache                        
            I  Directory Information                                           
            H  Hexadecimal Display          Other Functions                    
            W  Write to work file                                              
            X  Display sorted extract       S  Select Buffer Pool              
            ?  Help                         B  Blacklist Maintenance           
            .  Exit                         P  Preload List Maintenance        
                                                                               
    Code .. _   Library ... *_______                                           
                Object .... *_______________________________________           
                DBID ...... 0____  FNR .. 0____  Object Pool ... B (B,C,*)     
                                                                               
                                                                               
Command ===>                                                                   
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
      Help        Exit  Last        Flip                                Canc

In the SYSBPM Main Menu, specify the executed object(s) loaded in the buffer pool or BP cache by choosing either of the following options:
- Complete the input fields as described in SYSBPM Main Menu - Fields, Functions and Commands.
  
  Or:
  In the Command line, enter a SYSBPM direct command as described in SYSBPM Direct Commands.

Online Help

The online help function of SYSBPM provides information on SYSBPM direct commands (see the relevant section) or valid input values for fields that appear on SYSBPM screens.

To invoke the online help function for SYSBPM direct commands

On any SYSBPM screen, position the cursor in the Command line and press PF1 or enter a question mark (?).

The Help window appears with a list of all SYSBPM direct commands available.

To invoke the online help function for a SYSBPM input field

On any SYSBPM screen, position the cursor in any input field and press PF1 or enter a question mark (?).

The Help window appears for the relevant field with a list of all valid input values.

SYSBPM Main Menu - Fields, Functions and Commands

This section covers the following topics:

Fields
Functions
PF Keys and Direct Commands

Fields

The fields contained in the SYSBPM Main Menu are described in the following table:

Fields Explanation

BPNAME

The name of the global buffer pool as specified with the profile parameter BPNAME. For a local buffer pool, no name but a blank field is displayed for BPNAME.

See also BPNAME - Name of Natural Global Buffer Pool in the Parameter Reference documentation.

BPPROP

The setting of the profile parameter BPPROP to control the propagation of changes to an object in a buffer pool.

See also BPPROP - Global Buffer Pool Propagation in the Parameter Reference documentation.

Type The type of buffer pool, such as Global Nat, Local Nat, Global Sort or Global DL/I.

Loc The location. Displays the host ID (in the example screen above: DAEF) and the subsystem ID (in the example screen above: QA41).

Preload

The name of a preload list if loaded.

Functions

The functions provided in the SYSBPM Main Menu are organized in three sections:

The Object Functions section contains functions for displaying or manipulating objects in the buffer pool or BP cache.
The Object Pool Statistics section contains functions for obtaining object-independent statistical data on the buffer pool or BP cache including hash tables. Object-independent data do not include any individual information on the object such as object name, size or addresses.
The Other Functions section contains functions for selecting a buffer pool and for specifying the objects to be loaded into the buffer pool or BP cache.

The individual functions are listed below. You invoke a function by entering the one-letter code that corresponds to the function required in the Code field, for example, L for List Objects.

Code	Function	Explanation
`L`	List Objects	Displays information on the objects loaded in the buffer pool and/or the BP cache (if used). Each list item can be accessed individually and various functions can be performed for each object.
`D`	Delete Objects	Deletes one or more objects from the buffer pool and the BP cache.
`I`	Directory Information	Displays the full directory information of a specified object loaded in the buffer pool or the BP cache.
`H`	Hexadecimal Display	Displays in hexadecimal format a specified object loaded in the buffer pool.
`W`	Write to Work File	Writes to a local file or a PC text file the object directory information located in the buffer pool and/or BP cache.
`X`	Display Sorted Extract	Displays a sorted list of 50 object directories located in the buffer pool or BP cache. The list items can be arranged by using any of the sort criteria provided.
`A`	Buffer Pool	Invokes the Buffer Pool Statistics menu. From this menu, you can invoke object-independent statistics functions for the buffer pool including hash table statistics.
`C`	BP Cache	BP cache required. Invokes the BP Cache Statistics menu. From this menu, you can invoke object-independent statistics functions for the BP cache including hash table statistics.
`S`	Select Buffer Pool	Displays a selection list of all available buffer pools.
`B`	Blacklist Maintenance	Invokes the Blacklist Maintenance menu which is used to maintain a blacklist of objects, which are not to be executed.
`P`	Preload List Maintenance	Invokes the Preload List Maintenance menu. In a preload list, you can specify the names of objects, which are to be loaded into the buffer pool when the buffer pool is initialized.

PF Keys and Direct Commands

In the SYSBPM Main Menu, you can use the PF keys or SYSBPM direct commands listed in the table below. An underlined portion of a command represents its minimum abbreviation. For further commands, see SYSBPM Direct Commands.

PF Key	Command	Function
PF1		Provides SYSBPM help information: see also Online Help.
PF3	`EXIT`	Leaves the current function/screen and displays the previous screen.
PF4	`LAST`	Displays the SYSBPM direct command entered most recently.
PF6	`FLIP`	Switches the PF-key line: toggles between the display of PF1 to PF12 and PF13 to PF24.
PF12	`CANCEL`	Same as `EXIT`.
PF15	`MENU`	Invokes the SYSBPM Main Menu.

SYSBPM in a z/OS Parallel Sysplex Environment

Whenever Natural switches to another operating system image (host), Natural also switches buffer pools. A switch of buffer pools is indicated by a different host ID, which is displayed in the Loc field of a SYSBPM screen.

Switching can take place after each terminal I/O, that is, after choosing any function key or by choosing ENTER. After switching buffer pools, browsing and positioning commands will not be executed (TOP, BOTTOM, +, -, LEFT, RIGHT). Instead, the list starts from the top of the new buffer pool.

If the BPPROP profile parameter (see BPPROP - Global Buffer Pool Propagation in the Parameter Reference documentation) is set to PLEX or to GPLEX, SYSBPM commands that manipulate blacklists, delete objects or initialize the buffer pool are first executed as usual, and then propagated to other buffer pools available on the same subsystem. If a BP switch caused a function to be aborted or propagated, an appropriate message appears. An appropriate message also appears if Natural has successfully switched to another host and changed buffer pools.

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