The Fast Communication Manager (FCM) Analysis drilldown provides a breakdown of message buffer traffic for the instance you are monitoring. FCM provides communication support between partitions for agent requests, and message buffers in DB2 environments.
Note: Setting DB2_FORCE_FCM_BP to YES in an MLN environment lets DB2 create FCM buffers in a separate memory segment. Once this is done, communications between FCM agents belonging to different logical partitions (on the same physical partition) occurs through shared memory.
This drilldown consists of two tabs:
Internode Summary tab—Breaks down the traffic between source partition and target partition and displays summary totals for data traffic.
Resources tab—Provides low water mark information for different types of traffic and displays utilization statistics.
The Internode Summary tab provides the following columns. Since you can choose to hide, display, or rearrange any column in the grid, some columns below might not display, or be in this order, in your current list view.
The Resource tab provides the following columns. Since you can choose to hide, display, or rearrange any column in the grid, some columns below might not display, or be in this order, in your current list view.
Intra-partition parallelism is the name for the breaking up of a query into several parts such as index creation, database loading, or SQL queries, operations usually considered as parts of a single task. When intra-partition parallelism is turned on, FCM helps these tasks run in parallel within a single database partition.
Note: In some environments, the intra_parallel parameter must be active before it can be used.