The dynamic_memory_info view shows a sum of the used and available dynamic memory for all segment instances on a segment host. Dynamic memory refers to the maximum amount of memory that Greenplum Database instance will allow the query processes of a single segment instance to consume before it starts cancelling processes. This limit, determined by the currently active resource management scheme (resource group-based or resource queue-based), is evaluated on a per-segment basis.

    ColumnTypeDescription
    ctimetimestamp(0) without time zoneTime this row was created in the segment_history table.
    hostnamevarchar(64)Segment or master hostname associated with these system memory metrics.
    dynamic_memory_used_mbnumericThe amount of dynamic memory in MB allocated to query processes running on this segment.
    dynamic_memory_available_mbnumericThe amount of additional dynamic memory (in MB) available to the query processes running on this segment host. Note that this value is a sum of the available memory for all segments on a host. Even though this value reports available memory, it is possible that one or more segments on the host have exceeded their memory limit.

    Parent topic: The gpperfmon Database