GS_WLM_SESSION_HISTORY

GS_WLM_SESSION_HISTORY displays load management information about all completed jobs executed by the current user on database instances. The current feature is a lab feature. Contact Huawei technical support before using it. 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.