gtpo1mfsOperations

ZSYSL-Display or Change Priority Class Shutdown Levels

Use this command to display or change shutdown levels for certain priority classes and block types. These shutdown levels pertain to entry control blocks (ECBs) that issue the LODIC macro.

Requirements and Restrictions

You can only enter this command from the basic subsystem (BSS).

Format




Display
displays the shutdown levels for each block type.

Alter
changes the shutdown levels for selected block types.

Class
displays or changes the shutdown level value associated with one of the following priority classes:

Note:
The IBMLO and IBMHI priority classes are reserved for use by IBM.

CMB
changes the shutdown level percentage for common blocks.

ECB
changes the shutdown level percentage for ECBs.

FRM
changes the shutdown level percentage for 4 KB frames.

IOB
changes the shutdown level percentage for input/output (I/O) blocks.

SWB
changes the shutdown level percentage for system work blocks (SWBs).

value
is the new shutdown level percentage from 0-100. This shutdown level percentage represents the minimum percentage of blocks that must be available to avoid shutdown for a certain transaction classification. For example, SWB-10 means that if the number of available system work blocks (SWBs) falls below 10% of the total number of SWBs, shutdown is in effect for that priority class.

Additional Information

Online help information is available for this command. To display the help information, enter one of the following:

ZSYSL HELP

ZSYSL ?

Examples

In the following example, the shutdown levels for 4 KB frames, common blocks, and system work blocks for the LOBATCH priority class are changed.

+--------------------------------------------------------------------------------+
|User:   ZSYSL A C-LOBATCH,FRM-55,CMB-60,SWB-75                                  |
|                                                                                |
|System: SYSL0003I 10.52.44                                                      |
|        OLD SHUTDOWN LEVELS FOR CLASS LOBATCH                                   |
|                                                                                |
|                    TOTAL    SHUTDOWN  SHUTDOWN                                 |
|        KEYWORD   ALLOCATED    LEVEL    PCT-AGE                                 |
|          CMB       2186        983       45                                    |
|          ECB        765        229       30                                    |
|          FRM       2769       1107       40                                    |
|          IOB       4480       1568       35                                    |
|          SWB        512        486       95                                    |
|                                                                                |
|        NEW SHUTDOWN LEVELS FOR CLASS LOBATCH                                   |
|                                                                                |
|                    TOTAL    SHUTDOWN  SHUTDOWN                                 |
|        KEYWORD   ALLOCATED    LEVEL    PCT-AGE                                 |
|          CMB       2186       1311       60                                    |
|          ECB        765        229       30                                    |
|          FRM       2769       1522       55                                    |
|          IOB       4480       1568       35                                    |
|          SWB        512        384       75                                    |
|        END OF DISPLAY                                                          |
+--------------------------------------------------------------------------------+

In the following example, the shutdown levels for the BATCH priority class are displayed.

+--------------------------------------------------------------------------------+
|User:   ZSYSL DISPLAY CLASS-BATCH                                               |
|                                                                                |
|System: SYSL0002I 17.52.21                                                      |
|        CURRENT SHUTDOWN LEVELS FOR CLASS BATCH                                 |
|                                                                                |
|                    TOTAL    SHUTDOWN  SHUTDOWN                                 |
|        KEYWORD   ALLOCATED    LEVEL    PCT-AGE                                 |
|          CMB        258        123       48                                    |
|          ECB        541        259       48                                    |
|          FRM       2709       1300       48                                    |
|          IOB       2272       1090       48                                    |
|          SWB       1128        541       48                                    |
|        END OF DISPLAY                                                          |
+--------------------------------------------------------------------------------+

Related Information

See TPF General Macros for more information about shutdown levels and their relationship to the LODIC macro.