How to detect database list operations that return many rows
(PEGA0027 alert)

Benefits

Through prconfig.xml file settings, you can identify database operations that return thousands of rows. Such operations can impact performance, even when the total number of bytes (for all rows combined) is small. In an alert log, the following message appears.

PEGA0027 *NA*Database list returned more rows than threshold allows

Other fields in the alert log message identify the pzInsKey value of the current activity.

Procedure

This facility is enabled by default, with a threshold of 25,000 rows. To establish another threshold:

1. Update the alerts section of the prconfig.xml file, setting a larger or smaller desired threshold in bytes:

<env name="alerts/database/rowReadThreshold/enabled" value="zzzzz" />
<env name="alerts/database/rowReadThreshold" value="nnnnn" />

where nnnnn is a positive integer identifying the number of rows in the query result.

Set the enabled value to false to disable this alert. The default is true.

2. Stop and restart the server.

Related alerts

This alert focuses on the number of rows returned. Other alerts bring attention to the elapsed time for a database operation or the number of bytes returned. Each alert can identify specific items for performance analysis and improvements.

	alert log, prconfig.xml file
	Understanding alerts Working with the PegaRULES database

SysAdmin category