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v5.0

Documentation:v5.0

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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
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