dynamic_memory_info
dynamic_memory_info
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 is set by the gp_vmem_protect_limit server configuration parameter, and 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 as set by the gp_vmem_protect_limit parameter. |