THREAD_WAIT_STATUS

This view allows you to test the blocking status about the backend thread and auxiliary thread of the current node.

**Table 1** THREAD_WAIT_STATUS columns
Name	Type	Description
node_name	text	Current node name.
db_name	text	Database name.
thread_name	text	Thread name.
query_id	bigint	Query ID. The value of this column is the same as that of debug_query_id.
tid	bigint	Thread ID of the current thread.
sessionid	bigint	Session ID.
lwtid	integer	Lightweight thread ID of the current thread.
psessionid	bigint	Parent thread of the streaming thread.
tlevel	integer	Level of the streaming thread.
smpid	integer	Concurrent thread ID.
wait_status	text	Waiting status of the current thread.
wait_event	text	If wait_status is acquire lock, acquire lwlock, or wait io, this column describes the lock, lightweight lock, or I/O information. Otherwise, this column is empty.
locktag	text	Information about the lock that the current thread is waiting for.
lockmode	text	Lock mode that the current thread is waiting to obtain. The values include table-level lock, row-level lock, and page-level lock modes.
block_sessionid	bigint	ID of the session that blocks the current thread from obtaining the lock.
global_sessionid	text	Global session ID.

Parent topic: Session/Thread

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