Monitoring internal sessions with MC

The Internal Sessions chart provides information about Vertica system activities, such as Tuple Mover and rebalance cluster operations, along with their corresponding resources, such as CPU/memory, networking, and disk I/O percent used.

The Internal Sessions chart provides information about Vertica system activities, such as Tuple Mover and rebalance cluster operations, along with their corresponding resources, such as CPU/memory, networking, and disk I/O percent used.

Hover your cursor over a bar for more information. A dialog box appears and provides details.

Filtering chart results

You can filter what the chart displays by selecting options for the following components. As you filter, the Records Requested number changes:

  • Category: Filter which internal session types (mergeout, rebalance cluster) appear in the graph. The number in parentheses indicates how many sessions are running on that operation.

  • Session duration: Lists time, in milliseconds, for all sessions that appear on the graph. The minimum/maximum values on which you can filter (0 ms to n ms) represent the minimum/maximum elapsed times within all sessions currently displayed on the graph. After you choose a value, the chart refreshes to show only the internal sessions that were greater than or equal to the value you select.

  • Records requested: Represents the total combined sessions for the Category and Session Duration filters.