OPERATOR_HISTORY_TABLE

queryid

bigint

Internal query ID used for statement execution.

pid

bigint

Backend thread ID.

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 the operator starts to process the first data record.

duration

bigint

Total execution time of the operator (unit: 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 all DNs (unit: MB).

max_peak_memory

integer

Maximum peak memory used by the operator on all DNs (unit: MB).

average_peak_memory

integer

Average peak memory used by the operator on all DNs (unit: MB).

memory_skew_percent

integer

Memory usage skew of the operator among each DN.

min_spill_size

integer

Minimum spilled data among all DNs when a spill occurs (unit: MB; default value: 0).

max_spill_size

integer

Maximum spilled data among all DNs when a spill occurs (unit: MB; default value: 0).

average_spill_size

integer

Average spilled data among all DNs when a spill occurs (unit: MB; default value: 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 (unit: ms).

max_cpu_time

bigint

Maximum execution time of the operator on all DNs (unit: ms).

total_cpu_time

bigint

Total execution time of the operator on all DNs (unit: ms).

cpu_skew_percent

integer

Skew of the execution time among DNs.

warning

text