GS_WLM_SESSION_INFO_ALL

GS_WLM_SESSION_INFO_ALL displays load management information about a completed job executed on the database instance. Only the user with the sysadmin or monitor admin permission can query this view.

Table 1 GS_WLM_SESSION_INFO_ALL columns

Name

Type

Description

datid

oid

OID of the database that this backend is connected to.

dbname

text

Name of the database the backend is connected to.

schemaname

text

Schema name.

nodename

text

Name of the CN where the statement is executed.

username

text

Username used for connecting to the backend.

application_name

text

Name of the application connected to the backend.

client_addr

inet

IP address of the client connected to the backend. If this column is null, it indicates either that the client is connected via a Unix socket on the server machine or that this is an internal process, such as autovacuum.

client_hostname

text

Host name of the connected client, as reported by a reverse DNS lookup of client_addr. This column will be non-null only for IP connections and only when log_hostname is enabled.

client_port

integer

TCP port number that the client uses for communication with the backend (–1 if a Unix socket is used).

query_band

text

Job type, which is specified by the GUC parameter query_band. The default value is a null string.

block_time

bigint

Duration that the statement is blocked before being executed, including the statement parsing and optimization duration (unit: ms)

start_time

timestamp with time zone

Time when the statement execution starts.

finish_time

timestamp with time zone

Time when the statement execution ends.

duration

bigint

Execution time of a statement. The unit is ms.

estimate_total_time

bigint

Estimated execution time of a statement. The unit is ms.

status

text

Final statement execution status, which can be finished (normal) or aborted (abnormal).

abort_info

text

Exception information displayed if the final statement execution status is aborted.

resource_pool

text

Resource pool used by the user.

control_group

text

Cgroup used by the statement.

estimate_memory

integer

Estimated memory size of the statement.

min_peak_memory

integer

Minimum memory peak of the statement across all DNs, in MB.

max_peak_memory

integer

Maximum memory peak of the statement across all DNs, in MB.

average_peak_memory

integer

Average memory usage during statement execution. The unit is MB.

memory_skew_percent

integer

Memory usage skew of a statement among DNs.

spill_info

text

Information about statement spilled to all DNs:
  • None: The statement has not been spilled to disks on any DNs.
  • All: The statement has been spilled to disks on every DN.
  • [a:b]: The statement has been spilled to disks on a of b DNs.

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_dn_time

bigint

Minimum execution time of the statement across all DNs, in ms.

max_dn_time

bigint

Maximum execution time of the statement across all DNs, in ms.

average_dn_time

bigint

Average execution time of the statement across all DNs, in ms.

dntime_skew_percent

integer

Execution time skew of the statement among DNs.

min_cpu_time

bigint

Minimum CPU time of the statement across all DNs, in ms.

max_cpu_time

bigint

Maximum CPU time of the statement across all DNs, in ms.

total_cpu_time

bigint

Total CPU time of the statement across all DNs, in ms.

cpu_skew_percent

integer

CPU time skew of the statement among DNs.

min_peak_iops

integer

Minimum IOPS peak of the statement across all DNs. It is counted by ones in a column-store table and by ten thousands in a row-store table.

max_peak_iops

integer

Maximum IOPS peak of the statement across all DNs. It is counted by ones in a column-store table and by ten thousands in a row-store table.

average_peak_iops

integer

Average IOPS peak of the statement across all DNs. It is counted by ones in a column-store table and by ten thousands in a row-store table.

iops_skew_percent

integer

I/O skew of the statement among DNs.

warning

text

Warning. The following warnings and warnings related to SQL self-diagnosis optimization are displayed:
  • 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

queryid

bigint

Internal query ID used for statement execution.

query

text

Statement executed.

query_plan

text

Execution plan of a statement.

node_group

text

Logical cluster of the user running the statement.

cpu_top1_node_name

text

Name of the node with the highest CPU usage.

cpu_top2_node_name

text

Name of the node with the second highest CPU usage.

cpu_top3_node_name

text

Name of the node with the third highest CPU usage.

cpu_top4_node_name

text

Name of the node with the fourth highest CPU usage.

cpu_top5_node_name

text

Name of the node with the fifth CPU usage.

mem_top1_node_name

text

Name of the node with the highest memory usage.

mem_top2_node_name

text

Name of the node with the second highest memory usage.

mem_top3_node_name

text

Name of the node with the third highest memory usage.

mem_top4_node_name

text

Name of the node with the fourth highest memory usage.

mem_top5_node_name

text

Name of the node with the fifth highest memory usage.

cpu_top1_value

bigint

CPU usage.

cpu_top2_value

bigint

CPU usage.

cpu_top3_value

bigint

CPU usage.

cpu_top4_value

bigint

CPU usage.

cpu_top5_value

bigint

CPU usage.

mem_top1_value

bigint

Memory usage.

mem_top2_value

bigint

Memory usage.

mem_top3_value

bigint

Memory usage.

mem_top4_value

bigint

Memory usage.

mem_top5_value

bigint

Memory usage.

top_mem_dn

text

Top N memory usage.

top_cpu_dn

text

Top N CPU usage.

n_returned_rows

bigint

Number of rows in the result set returned by the SELECT statement.

n_tuples_fetched

bigint

Number of rows randomly scanned.

n_tuples_returned

bigint

Number of rows sequentially scanned.

n_tuples_inserted

bigint

Number of rows inserted.

n_tuples_updated

bigint

Number of rows updated.

n_tuples_deleted

bigint

Number of rows deleted.

n_blocks_fetched

bigint

Number of buffer block access times.

n_blocks_hit

bigint

Number of buffer block hits.

db_time

bigint

Valid DB time, which is accumulated if multiple threads are involved (unit: μs).

cpu_time

bigint

CPU time (unit: μs).

execution_time

bigint

Execution time in the executor (unit: μs).

parse_time

bigint

SQL parsing time (unit: μs).

plan_time

bigint

SQL plan generation time (unit: μs).

rewrite_time

bigint

SQL rewriting time (unit: μs).

pl_execution_time

bigint

Execution time of PL/pgSQL (unit: μs).

pl_compilation_time

bigint

Compilation time of PL/pgSQL (unit: μs).

net_send_time

bigint

Network time (unit: μs).

data_io_time

bigint

I/O time (unit: μs).

is_slow_query

bigint

Whether the record is a slow SQL record.

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