GS_WLM_SESSION_HISTORY

GS_WLM_SESSION_HISTORY displays load management information about all completed jobs executed by the current user on database instances. Only users with the** sysadmin** or** monitor admin** permission can query this view.

Table 1 GS_WLM_SESSION_HISTORY columns

Name

Type

Description

datid

oid

OID of the database 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 database instance 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 the client is connected via a Unix socket on the server or 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 this 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 starts to be run.

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 the database instances, in MB.

max_peak_memory

integer

Maximum memory peak of the statement across the database instances, in MB.

average_peak_memory

integer

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

memory_skew_percent

integer

Memory usage skew of the statement among the database instances.

spill_info

text

Information about statement spill to the database instances:
  • None: The statement has not been spilled to disks on the database instances.
  • All: The statement has been spilled to disks on the database instances.
  • [a:b]: The statement has been spilled to disks on a of b database instances.

min_spill_size

integer

Minimum spilled data among database instances when a spill occurs (unit: MB). Default value: 0

max_spill_size

integer

Maximum spilled data among database instances when a spill occurs (unit: MB). Default value: 0

average_spill_size

integer

Average spilled data among database instances when a spill occurs (unit: MB). Default value: 0

spill_skew_percent

integer

Database instance spill skew when a spill occurs.

min_dn_time

bigint

Minimum execution time of the statement across the database instances (unit: ms).

max_dn_time

bigint

Maximum execution time of the statement across the database instances (unit: ms).

average_dn_time

bigint

Average execution time of the statement across the database instances (unit: ms).

dntime_skew_percent

integer

Execution time skew of the statement among the database instances.

min_cpu_time

bigint

Minimum CPU time of the statement across the database instances (unit: ms).

max_cpu_time

bigint

Maximum CPU time of the statement across the database instances (unit: ms).

total_cpu_time

bigint

Total CPU time of the statement across the database instances (unit: ms).

cpu_skew_percent

integer

CPU time skew of the statement among the database instances.

min_peak_iops

integer

Minimum IOPS peak of the statement across the database instances. 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 the database instances. 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 the database instances. 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 the database instances.

warning

text

Warning. The following warnings 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 database instance of the user to which the statement belongs.

cpu_top1_node_name

text

Name of the node with the 1st CPU usage.

cpu_top2_node_name

text

Name of the node with the 2nd CPU usage.

cpu_top3_node_name

text

Name of the node with the 3rd CPU usage.

cpu_top4_node_name

text

Name of the node with the 4th CPU usage.

cpu_top5_node_name

text

Name of the node with the 5th CPU usage.

mem_top1_node_name

text

Name of the node with the 1st memory usage.

mem_top2_node_name

text

Name of the node with the 2nd memory usage.

mem_top3_node_name

text

Name of the node with the 3rd memory usage.

mem_top4_node_name

text

Name of the node with the 4th memory usage.

mem_top5_node_name

text

Name of the node with the 5th 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.

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    openGauss 2024-07-19 01:03:13
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