GS_WLM_SESSION_STATISTICS

GS_WLM_SESSION_STATISTICS displays load management information about jobs being executed by the current user on the database instance. Only users with the sysadmin permission can query this view.

Table 1 GS_WLM_SESSION_STATISTICS columns

Name	Type	Description
datid	oid	OID of the database the backend is connected to
dbname	name	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	name	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.
pid	bigint	ID of the backend thread
sessionid	bigint	Session ID
block_time	bigint	Block time before the statement is run. The unit is ms.
start_time	timestamp with time zone	Time when the statement execution starts
duration	bigint	Duration that the statement has been executed (unit: ms)
estimate_total_time	bigint	Estimated execution time of the statement. The unit is ms.
estimate_left_time	bigint	Estimated remaining time of statement execution. The unit is ms.
enqueue	text	Resource status in workload management
resource_pool	name	Resource pool used by the user
control_group	text	Cgroup used by the statement
estimate_memory	integer	Estimated memory used by the statement. The unit is MB.
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, in 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). The default value is 0.
max_spill_size	integer	Maximum spilled data among database instances when a spill occurs (unit: MB). The default value is 0.
average_spill_size	integer	Average spilled data among database instances when a spill occurs (unit: MB). The default value is 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 that is being executed
query_plan	text	Execution plan of the statement
node_group	text	Logical database instance of the user to which the statement belongs
top_cpu_dn	text	Top N CPU usage
top_mem_dn	text	Top N memory usage