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Limited support BMC provides limited support for this version of the product. As a result, BMC no longer accepts comments in this space. If you encounter problems with the product version or the space, contact BMC Support.BMC recommends upgrading to the latest version of the product. To see documentation for that version, see CHECK PLUS for DB2 13.1.

Tuning for performance

The CHECK PLUS for DB2 product provides several options that you can use to influence its performance. Some options affect the performance of the entire product; others influence processing for specific functions of CHECK PLUS. This section explains the effects that these options have on the performance of CHECK PLUS.

Setting installation options for optimal performance

In general, you should use the values that were shipped with CHECK PLUS for the installation options. These values will usually provide you with optimal performance. However, there are certain environments for which BMC recommends that you make adjustments to these values. It describes these recommendations for CHECK PLUS. For a complete description of each installation option, see CHECK-PLUS-installation-options.

Warning

Important

If you modify these options after installation, you must rerun the installation job for these modifications to take effect.

Installation option changes for performance

Installation option

Recommended value

Comments

DRNDELAY and DRNRETRY

None

Adjust these options based on how long you are willing to wait for a successful drain.

(0K,0K)

This value is the default value. We recommend that you do not change this value except under instructions from BMC Support.

PROB

If you can ensure that all exits that CHECK PLUS calls can run in problem states, specify this value to obtain significant savings in CPU overhead.

20

The multiplier that CHECK PLUS applies to the value of the WBUFFS option value is 32 KB. For WBUFFS, we recommend a value of 20 for this option (the value that is shipped with CHECK PLUS).

Specifying command options for optimal performance

It describes command option recommendations to obtain optimal performance when running CHECK PLUS. For a complete description of the CHECK command options and values, see CHECK-command-syntax.

The following table lists CHECK PLUS command options that correspond to the installation options listed. BMC recommends that you specify the CHECK command options that are listed in the following table if they are not already specified in the installation options. 

Command option

Corresponding installation option

RETRY n where n is based on your environment

DRNRETRY=n where n is based on your environment

RETRY_DELAY n where n is based on your environment

DRNDELAY=n where n is based on your environment

This section describes the following topics:

Related topics

Using

Tuning CHECK PLUS jobs

CHECK-PLUS-installation-options


 

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CHECK PLUS for DB2 11.2