GLOBAL_ACTIVE_SESSION

GLOBAL_ACTIVE_SESSION displays a summary of samples in the ACTIVE SESSION PROFILE memory on CN and main DN nodes, as described in Table 1. The event_start_time, current_xid, and top_xid columns are added to GaussDB Kernel 505.0. After GaussDB Kernel is upgraded to GaussDB Kernel 505.0 or later, the columns cannot be queried during the upgrade observation period.

**Table 1** GLOBAL_ACTIVE_SESSION columns
Name	Type	Description
node_name	text	Node name.
sampleid	bigint	Sample ID.
sample_time	timestamp without time zone	Sampling time.
need_flush_sample	Boolean	Specifies whether the sample needs to be refreshed.
databaseid	oid	Database ID.
thread_id	bigint	Thread ID.
sessionid	bigint	Session ID.
start_time	timestamp without time zone	Start time of a session.
event	text	Specified event name.
lwtid	integer	Lightweight thread ID of the current thread.
psessionid	bigint	Parent thread of the streaming thread.
tlevel	integer	Level of the streaming thread. The value corresponds to the level (ID) of the execution plan.
smpid	integer	Concurrent thread ID in SMP execution mode.
userid	oid	ID of a session user.
application_name	text	Name of an application.
client_addr	inet	IP address of a client.
client_hostname	text	Name of a client.
client_port	integer	TCP port number used by a client to communicate with the backend.
query_id	bigint	Debug query ID.
unique_query_id	bigint	Unique query ID.
user_id	oid	User ID in the key of the unique query.
cn_id	integer	A CN ID on a DN indicates that the unique SQL statement comes from a CN ID in a key of the unique query on a CN.
unique_query	text	Standardized UniqueSQL text string.
locktag	text	Information of a lock that the session waits for, which can be parsed using locktag_decode.
lockmode	text	Mode of a lock that the session waits for.
block_sessionid	bigint	Blocks a session from obtaining the session ID of a lock if the session is waiting for the lock.
final_block_sessionid	bigint	ID of the blocked session at the source end.
wait_status	text	Provides more details about the event column.
global_sessionid	text	Global session ID.
xact_start_time	timestamp with time zone	Start time of the transaction.
query_start_time	timestamp with time zone	Time when the statement starts to be executed.
state	text	Current statement state. The value can be active, idle in transaction, fastpath function call, idle in transaction (aborted), disabled, or retrying.
event_start_time	timestamp with time zone	Start time of a wait event.
current_xid	xid	Current transaction ID.
top_xid	xid	Top-level transaction ID.
parent_unique_sql_id	bigint	SQL_Id of the parent statement that calls the statement.