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PEGA0079 alert: Record size written by Decision Data Store above threshold

The PEGA0079 alert is triggered when the size of the record that is written by the Decision Data Store service exceeds the threshold.

Example message text

DDS record size <actual size> KB exceeds the threshold of <threshold> KB for column family <column family> with keys <keys>

The following variables are in the message text:

  • <threshold> is the maximum size of the record that is written by the Decision Data Store service. The default threshold is 1024 KB. The threshold value is set in the alerts/ddsWriteSizeThreshold Dynamic System Settings.
  • <actual size> is the actual size of the record that was written by the Decision Data Store service.
  • <column family> is the name of the column family that is the Cassandra table where the record is stored. The column contains the data set name where the record was written.
  • <keys> are the data set keys that were specified during data set creation. The combination of the column family and the keys uniquely identifies the record that triggered the alert.

Reasons for the alert

To eliminate this alert, modify the application to reduce the record size to less than 1MB. For example, determine whether all fields are required to be stored and eliminate any that are not needed, eliminate duplicate data, and analyze the data flow and consider removing aggregations of a large amount of data into a single record. Writing of large-size data can affect performance. If you do not observe performance issues, you might consider increasing the threshold value.


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