Exception Management. Teradata Release 15.10 User Guide

CHAPTER 8

Workload Exceptions

Exception Management

TASM monitors and manages running requests and can act if a request exceeds expected limits. Administrators can use the Exceptions area on the Ruleset toolbar to define behavioral limits and the remedial actions TASM should take when a limit is exceeded.

Tactical workloads have system-provided exceptions.

You can create exceptions as follows using Workload Designer:

• By Planned Environment: Within each planned environment, specify which exceptions are enabled for a workload.

• By Workload: For each workload, specify which exceptions apply in a planned environment.

• By Exception: For each exception, specify the workloads and planned environment for which it is enabled.

Exception Criteria Options

Two types of user-specified durations may be associated with exceptions:

• A threshold. The specified action occurs as soon as the threshold is exceeded. Most exceptions are in this category. These include the following exceptions:

• Maximum spool rows

• Spool usage in bytes

• I/O count

• Spool size

• Blocked time

• Elapsed time (with the options to exclude blocked time and exclude throttle delay time)

• Number of AMPs

• CPU time (summed over all nodes)

• Tactical CPU usage threshold per node

• Tactical I/O physical bytes per node

• I/O physical bytes

• A threshold and a qualification period. The specified action occurs only after the exception has persisted beyond a certain value for a specified time. The following exceptions are in this category:

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