Using the grid
View Session details
To view session details, right-click an entry in the grid and select View Session Details.
The hierarchy in this tree diagram
The hierarchy in this tree diagram represents the blocking chains. It shows who is blocking whom and makes it easy to see who is at the head of the chain and is the root cause of all the blocking.
The tree will show one entry for each session that is blocked, and one for each session that is blocking another but is not blocked itself. Sessions at the top of the tree (those that do not have a “parent” in the tree) are at the head of the blocking chain.
Refresh
The screen refreshes automatically. To pause Auto Refresh click 
. Click again to re-start auto refresh.
Kill this session
To close a SQL Server session, right-click and select Kill this Session. This will end the entire connection (SPID), not just the lock you selected.
Available columns include:
SPID
The unique session number for the session owning or requesting the lock.
Wait Time
How long this session has been waiting for the lock (measured in milliseconds). This shows 0 if the session is not waiting.
Type
The type of the lock request that is waiting (Database, Table, Page, Row, Key, Extent, etc.).
Resource
The resource that is in conflict. This often identifies a database and table.
The data in the Resource column is reported directly from Azure SQL Managed instance and, for performance reasons, is not resolved to actual resource names during normal data collection. To resolve the data to a more readable form, click the Question Mark button.
Command
The current or previous command that ran.
SQL User
Identifies the user associated with the SPID.
Program
The application program that the user is using (for example, Microsoft Access).
Win User
Identifies the user associated with the SPID.
CPU
The total amount of CPU consumed by the session so far. Can be useful when deciding which sessions to kill.
I/O
The total amount of I/O consumed by the session so far. Can be useful when deciding which sessions to kill.
Host Name
The name of the client computer.
Status
The status of the session (Blocked, Blocking or both). For sessions at the head of the blocking chain (those that are not blocked), this will also indicate if the session is Runnable or Sleeping.
Session SQL
Displays the SQL belonging to the session that is blocked and/or blocking.
DB Name
The name of the database.
Optimize SQL
You can use SQL Optimizer (if installed) to tune the SQL for the selected session. To do this, right-click a row in the grid and select Optimize SQL.