GS_WLM_SESSION_STATISTICS

GS_WLM_SESSION_STATISTICS displays load management information about jobs being executed by the current user on the current CN.

**Table 1** GS_WLM_SESSION_STATISTICS columns
Name	Type	Description
datid	oid	OID of the database this backend is connected to
dbname	name	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	name	User name used for connecting to the backend
application_name	text	Name of the application that is connected to the backend
client_addr	inet	IP address of the client connected to this 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 only be non-null 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, or -1 if a Unix socket is used
query_band	text	Job type, which is specified by the GUC parameter query_band parameter. The default value is a null string.
pid	bigint	Process ID of the backend
block_time	bigint	Block time before the statement is executed. The unit is ms.
start_time	timestamp with time zone	Time when the statement starts to be executed
duration	bigint	For how long a statement has been executing. The unit is ms.
estimate_total_time	bigint	Estimated execution time of a statement. The unit is ms.
estimate_left_time	bigint	Estimated remaining time of statement execution. The unit is ms.
enqueue	text	Workload management resource status
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 a statement across all DNs. The unit is MB.
max_peak_memory	integer	Maximum memory peak of a statement across all DNs. The unit is 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	Statement spill information on all DNs. None indicates that the statement has not been flushed to disks on any DNs. All indicates that the statement has been flushed to disks on every DN. [a:b] indicates that the statement has been flushed to disks on a of b DNs.
min_spill_size	integer	Minimum spilled data among all DNs when a spill occurs. The unit is MB. The default value is 0.
max_spill_size	integer	Maximum spilled data among all DNs when a spill occurs. The unit is MB. The default value is 0.
average_spill_size	integer	Average spilled data among all DNs when a spill occurs. The unit is MB. The default value is 0.
spill_skew_percent	integer	DN spill skew when a spill occurs
min_dn_time	bigint	Minimum execution time of a statement across all DNs. The unit is ms.
max_dn_time	bigint	Maximum execution time of a statement across all DNs. The unit is ms.
average_dn_time	bigint	Average execution time of a statement across all DNs. The unit is ms.
dntime_skew_percent	bigint	Execution time skew of a statement among DNs.
min_cpu_time	bigint	Minimum CPU time of a statement across all DNs. The unit is ms.
max_cpu_time	bigint	Maximum CPU time of a statement across all DNs. The unit is ms.
total_cpu_time	bigint	Total CPU time of a statement across all DNs. The unit is ms.
cpu_skew_percent	integer	CPU time skew of a statement among DNs.
min_peak_iops	integer	Minimum IOPS peak of a 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 a 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 a 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 across DNs.
warning	text	Warning. The following warnings and warnings related to SQL self-diagnosis tuning 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 a statement
node_group	text	Logical cluster of the user running the statement