Tanzu GemFire can monitor and throw an exception when a query runs longer than a configured amount of time. This feature is enabled by setting the critical-heap-percentage attribute which detects that the JVM has too little heap memory.

The default query timeout is five hours. Set a different amount of time, in milliseconds, by specifying the system variable gemfire.Cache.MAX_QUERY_EXECUTION_TIME. A value of -1 explicitly deactivates the timeout.

When enabled, a query that runs longer than the configured timeout will be cancelled such that it does not finish, and Tanzu GemFire throws a QueryExecutionTimeoutException.

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