Flushing tables

About this task

Flush the memtables to SSTables on disk manually with the Flush menu option in OpsCenter Node Administration. Performing a flush might be necessary before taking a backup, or when performance issues arise due to inadequate flush frequency.

For more information, see the corresponding nodetool flush command.


If OpsCenter role-based security is enabled, be sure that the permission for the Flush option in Node Operations is enabled for the appropriate user roles.


  1. Click cluster name > Nodes.

  2. In the List view, select a node.

  3. From the Other Actions menu, click Flush.

    The Flush option is also available from the Actions menu in the Node Details dialog.

    The Choose a Keyspace dialog appears.

    Choose keyspace to flush dialog

  4. Choose a keyspace to flush and click Choose.

    The Choose a Table dialog appears.

    Choose one or more tables in a keyspace to flush dialog

  5. Choose one or more tables to flush and click Choose.

    The Flush Node dialog prompts you to confirm the operation.

    Flush tables in a keyspace confirmation dialog

  6. Click Flush.

    A message in the top banner indicates the flush is in progress. Click the Show Details link to view the progress in the Activities page General tab. The banner message indicates when the flush is complete.

    Banner message that flush is complete on noted IP