GS_WLM_OPERATOR_INFO

GS_WLM_OPERATOR_INFO displays records about operators of completed jobs. The data is dumped from the kernel to the system catalog. This system catalog can be queried by users with the sysadmin permission only in Postgres.

Table 1 GS_WLM_OPERATOR_INFO columns

Name	Type	Description
queryid	bigint	Internal query ID used for statement execution
pid	bigint	Thread ID of the backend
plan_node_id	integer	Plan node ID of the execution plan of a query
plan_node_name	text	Name of the operator corresponding to the plan node ID
start_time	timestamp with time zone	Time when an operator starts to process the first data record
duration	bigint	Total execution time of the operator, in ms
query_dop	integer	DOP of the operator
estimated_rows	bigint	Number of rows estimated by the optimizer
tuple_processed	bigint	Number of elements returned by the operator
min_peak_memory	integer	Minimum peak memory used by the operator on database nodes (unit: MB)
max_peak_memory	integer	Maximum peak memory used by the operator on database nodes (unit: MB)
average_peak_memory	integer	Average peak memory used by the operator on database nodes (unit: MB)
memory_skew_percent	integer	Memory usage skew of the operator among database nodes
min_spill_size	integer	Minimum spilled data among database nodes when a spill occurs (unit: MB) (default value: 0)
max_spill_size	integer	Maximum spilled data among database nodes when a spill occurs (unit: MB) (default value: 0)
average_spill_size	integer	Average spilled data among database nodes when a spill occurs (unit: MB) (default value: 0)
spill_skew_percent	integer	Database node spill skew when a spill occurs
min_cpu_time	bigint	Minimum execution time of the operator on database nodes (unit: ms)
max_cpu_time	bigint	Maximum execution time of the operator on database nodes (unit: ms)
total_cpu_time	bigint	Total execution time of the operator on database nodes (unit: ms)
cpu_skew_percent	integer	Execution time skew among database nodes
warning	text	The following warnings are displayed: - Sort/SetOp/HashAgg/HashJoin spill - Spill file size large than 256MB - Broadcast size large than 100MB - Early spill - Spill times is greater than 3 - Spill on memory adaptive - Hash table conflict