GS_WLM_OPERATOR_STATISTICS displays the operator information of jobs that is being executed by the current user. This functionality supports only statements involving operators such as the stream operator and is used to analyze the performance optimization points for slow statements.
Name |
Type |
Description |
|---|---|---|
queryid |
bigint |
Internal query_id used for statement execution |
pid |
bigint |
ID of the backend thread |
plan_node_id |
integer |
plan_node_id of the execution plan of a query |
plan_node_name |
text |
Name of the operator corresponding to plan_node_id. The maximum length of the operator name is 127 characters (excluding format characters such as spaces). |
start_time |
timestamp with time zone |
Time when the operator starts to be executed for the first time. |
duration |
bigint |
Total execution time of the operator from the start to the end, in milliseconds. |
status |
text |
Execution status of the current operator. The value can be waiting, running, or finished. |
query_dop |
integer |
DOP of the current operator |
estimated_rows |
bigint |
Number of rows estimated by the optimizer. If the number of returned estimated rows exceeds int64_max, int64_max is displayed. |
tuple_processed |
bigint |
Total number of elements returned by the current operator on all DNs. If the estimated number of returned rows exceeds int64_max, int64_max is displayed. |
min_peak_memory |
integer |
Minimum peak memory used by the current operator on all DNs. The unit is MB. |
max_peak_memory |
integer |
Maximum peak memory used by the current operator on all DNs. The unit is MB. |
average_peak_memory |
integer |
Average peak memory used by the current operator on all DNs. The unit is MB. |
memory_skew_percent |
integer |
Memory usage skew of the current operator among DNs |
min_spill_size |
integer |
Minimum logical spilled data among all DNs when a spill occurs, in MB. The default value is 0. |
max_spill_size |
integer |
Maximum logical spilled data among all DNs when a spill occurs, in MB. The default value is 0. |
average_spill_size |
integer |
Average logical spilled data among all DNs when a spill occurs, in MB. The default value is 0. |
spill_skew_percent |
integer |
DN spill skew when a spill occurs |
min_cpu_time |
bigint |
Minimum execution time of the operator on all DNs. The unit is ms. |
max_cpu_time |
bigint |
Maximum execution time of the operator on all DNs. The unit is ms. |
total_cpu_time |
bigint |
Total execution time of the operator on all DNs. The unit is ms. |
cpu_skew_percent |
integer |
Skew of the execution time among DNs. |
warning |
text |
Warning. The following warnings are displayed:
|