Information in the Application Checkpoint report

The Application Checkpoint report contains a single section that lists information about included BMP jobs.

The following table identifies the fields in this report. The report lists BMP jobs in order by the timestamp of the first record that Log Analyzer found in the input logs for each BMP job.

Application Checkpoint report fields

Field

Description

JOB

The JOB field contains the name of the job that was submitted to run the BMP program.

If a BMP job is included but does not issue any checkpoints and does not update any databases, it is not listed in the report.

PSB

The PSB field contains the name of the program specification block (PSB) through which the BMP program works with database records.

LUOW#

The LUOW# field contains the number that identifies the logical unit of work (LUOW) to which Log Analyzer has assigned this BMP job. This LUOW represents all of the work that the BMP job performed, as captured in the input logs.

#CHKPTS/TYPE

The #CHKPTS/TYPE field contains the number of checkpoint calls that this BMP job issued, followed by a string to identify the type of checkpoint call:

  • SIMPLE

    The BMP job issued simple (basic) checkpoint calls, which are represented by type 41 log records.

  • SYMBOLIC

    The BMP job issued symbolic (extended) checkpoint calls, which are represented by type 41 and type 18 log records.

JOB DURATION

The JOB DURATION field indicates the amount of time (in hours, minutes, and seconds) that elapsed while this BMP job was executing. Log Analyzer calculates this time by subtracting the timestamp of the first record that was found in the logs for the BMP job from the timestamp of the last record for the BMP job.

Note

If the logs do not contain all records from the execution, this value might not be the true duration of the execution.

CHECKPOINT FREQUENCY /MIN /SEC

The CHECKPOINT FREQUENCY /MIN /SEC field indicates how often the BMP job issued checkpoints. Log Analyzer calculates this frequency by dividing the number of checkpoints issued by the duration of the BMP job.

If you specified the APPCHECK=ALL keyword, Log Analyzer lists the frequency in the appropriate column as follows:

  • /SEC

    The BMP job issued more than one checkpoint per second.

  • /MIN

    The BMP job issued less than one checkpoint per second.

If you specified the APPCHECK keyword with the THRESH subkeyword, Log Analyzer lists the frequency in the column that you specified with this subkeyword.

If you specified the APPCHECK keyword with other subkeywords but you omitted the THRESH subkeyword, Log Analyzer lists the frequency in the /MIN column.

Exceptions

If you did not specify a checkpoint frequency filter (that is, you omitted the CHKFREQ subkeyword), the Exceptions field can flag the following conditions as applicable:

  • *** more than 1 chkp / sec

    The BMP job issued checkpoints at an average frequency that was greater than one checkpoint every second.

  • *** less than 4 chkps / min

    The BMP job issued checkpoints at an average frequency that was less than four checkpoints every minute.

  • *** no checkpoints

    The BMP job updated database records but did not issue any checkpoints.

If you specified the CHKFREQ subkeyword, these exception flags are suppressed.

 

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