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.
| Column | Type | Description |
|---|---|---|
ctime |
timestamp(0) without time zone | Time this row was created in the segment_history table. |
hostname |
varchar(64) | Segment or master hostname associated with these system memory metrics. |
dynamic_memory_used_mb |
numeric | The amount of dynamic memory in MB allocated to query processes running on this segment. |
dynamic_memory_available_mb |
numeric | The 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
