Appendices

Table 1 PG_STAT_ACTIVITY Columns

Name	Type	Description
datid	oid	OID of the database that the user session connects to in the backend
datname	name	Name of the database that the user session connects to in the backend
pid	bigint	Thread ID of the backend
sessionid	bigint	Session ID
usesysid	oid	OID of the user logged in to the backend
usename	name	Name of the user logged in 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)
backend_start	timestamp with time zone	Time when this process was started, that is, when the client connected to the server
xact_start	timestamp with time zone	Time when current transaction was started (null if no transaction is active) If the current query is the first of its transaction, the value of this column is the same as that of the query_start column.
query_start	timestamp with time zone	Time when the currently active query was started, or if state is not active, when the last query was started
state_change	timestamp with time zone	Time when the state was last changed
waiting	Boolean	Whether the backend is currently waiting on a lock. If yes, the value is true.
enqueue	text	Unsupported currently
state	text	Overall status of this backend. The value must be one of the following: - active: The backend is executing a query. - idle: The backend is waiting for a new client command. - idle in transaction: The backend is in a transaction, but there is no statement being executed in the transaction. - idle in transaction (aborted): The backend is in a transaction, but there are statements failed in the transaction. - fastpath function call: The backend is executing a fast-path function. - disabled: This state is reported if track_activities is disabled in this backend. NOTE: Common users can view their own session status only. The state information of other accounts is empty. For example, after user judy is connected to the database, the state information of user joe and the initial user omm in pg_stat_activity is empty. SELECT datname, usename, usesysid, state,pid FROM pg_stat_activity; `datname
resource_pool	name	Resource pool used by the user
query_id	bigint	ID of a query
query	text	Text of this backend's most recent query. If state is active, this column shows the ongoing query. In all other states, it shows the last query that was executed.
connection_info	text	A string in JSON format recording the driver type, driver version, driver deployment path, and process owner of the connected database. For details, see connection_info.

Table 2 GS_WLM_SESSION_HISTORY Columns

Name	Type	Description
datid	oid	OID of the database that the backend is connected to
dbname	text	Name of the database that the backend is connected to
schemaname	text	Schema name
nodename	text	Name of the database node 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 executed
finish_time	timestamp with time zone	Time when the statement execution ends
duration	bigint	Execution time of the statement, in ms
estimate_total_time	bigint	Estimated execution time of the statement, in 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	The function is not supported currently.
estimate_memory	integer	Estimated memory size of the statement.
min_peak_memory	integer	Minimum memory peak of the statement across the database nodes, in MB
max_peak_memory	integer	Maximum memory peak of the statement across the database nodes, in MB
average_peak_memory	integer	Average memory usage during statement execution (unit: MB)
memory_skew_percent	integer	Memory usage skew of the statement among the database nodes
spill_info	text	Information about statement spill to the database nodes - None: The statement has not been spilled to disks on the database nodes. - All: The statement has been spilled to disks on the database nodes. - [a:b]: The statement has been spilled to disks on a of b database nodes.
min_spill_size	integer	Minimum spilled data among database nodes when a spill occurs, in MB (default value:0)
max_spill_size	integer	Maximum spilled data among database nodes when a spill occurs, in MB (default value:0)
average_spill_size	integer	Average spilled data among database nodes when a spill occurs, in MB (default value:0)
spill_skew_percent	integer	database node spill skew when a spill occurs
min_dn_time	bigint	Minimum execution time of the statement across the database nodes, in ms
max_dn_time	bigint	Maximum execution time of the statement across the database nodes, in ms
average_dn_time	bigint	Average execution time of the statement across the database nodes, in ms
dntime_skew_percent	integer	Execution time skew of the statement among the database nodes
min_cpu_time	bigint	Minimum CPU time of the statement across the database nodes, in ms
max_cpu_time	bigint	Maximum CPU time of the statement across the database nodes, in ms
total_cpu_time	bigint	Total CPU time of the statement across the database nodes, in ms
cpu_skew_percent	integer	CPU time skew of the statement among database nodes
min_peak_iops	integer	Minimum IOPS peak of the statement across the database nodes. 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 nodes. 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 nodes. 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 database nodes
warning	text	Warning. The following warnings are displayed: - Spill file size large than 256 MB - Broadcast size large than 100 MB - 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 the statement
node_group	text	Unsupported currently
cpu_top1_node_name	text	Name of the current database node
cpu_top2_node_name	text	Unsupported currently
cpu_top3_node_name	text	Unsupported currently
cpu_top4_node_name	text	Unsupported currently
cpu_top5_node_name	text	Unsupported currently
mem_top1_node_name	text	Current database name
mem_top2_node_name	text	Unsupported currently
mem_top3_node_name	text	Unsupported currently
mem_top4_node_name	text	Unsupported currently
mem_top5_node_name	text	Unsupported currently
cpu_top1_value	bigint	CPU usage of the current database node
cpu_top2_value	bigint	Unsupported currently
cpu_top3_value	bigint	Unsupported currently
cpu_top4_value	bigint	Unsupported currently
cpu_top5_value	bigint	Unsupported currently
mem_top1_value	bigint	Memory usage of the current database node
mem_top2_value	bigint	Unsupported currently
mem_top3_value	bigint	Unsupported currently
mem_top4_value	bigint	Unsupported currently
mem_top5_value	bigint	Unsupported currently
top_mem_dn	text	Memory usage information of the current database node
top_cpu_dn	text	CPU usage information of the current database node