MV_ACTIVITIES_CUMULATIVE

This view provides a high-level summary profile of completed and currently running tasks on all nodes of the cluster.

It holds a row per high-level activity H. Each row describes tasks which have completed or are currently running, and which are either instances of the high level activity H, or else instances of an activity L whose aggregator activity name is the name of H. It reports the sum of the profiling statistics of each task in the set, as collected over its lifetime. Activities can include tasks such as garbage collection and backups, in addition to queries.

The effect of grouping the instances of multiple activities together is mainly to group all tasks associated with a query, across all partitions, into a single row.

For cross-database queries, activities in this table are tracked in relation to the context database of the local query. For activities on an aggregator, this is the context database of the session. For activities on leaves, this is the context database chosen by the optimizer for each part of the query. In general, leaf activities occur on the database that stores the table(s) being queried.

mv_activities_cumulative may only be queried while connected to an aggregator node.

SingleStore recommends against extensive use of this table. It does not accurately describe past system behavior because it doesn’t include all completed instances. This is because historical task statistics may be discarded by SingleStore at unspecified times.