Cassandra database out-of-memory error

A Total Events (SMTT) alarm is triggered when the Cassandra database has an out-of-memory error. If this error occurs, contact technical support to work through the issue.

About this task

If an out-of-memory error occurs for the Cassandra database, a heap dump is created, a Total Events (SMTT) alarm is triggered, and the Cassandra Heap Out Of Memory Errors count is incremented by one.


  1. To view the event, select Nodes > grid node > Events.
  2. Verify that the Cassandra Heap Out Of Memory Errors count is 1 or greater.
  3. Go to /var/local/core/, compress the Cassandra.hprof file, and send it to technical support.
  4. Make a backup of the Cassandra.hprof file, and delete it from the /var/local/core/ directory.
    This file can be as large as 24 GB, so you should remove it to free up space.
  5. Once the issue is resolved, click Reset event counts.
    Note: To reset event counts, you must belong to a group that has the Grid Topology Page Configuration permission.