sp_lock

Description

Reports the object names and IDs of processes that currently hold locks.

Syntax

sp_lock [spid1[, spid2]] | [@verbose = int]

Parameters

spid1

is the Adaptive Server process ID number from the master.dbo.sysprocesses table. Run sp_who to get the spid of the locking process.

spid2

is another Adaptive Server process ID number to check for locks.

@verbose = int

displays a concatenated name of the table names instead of a spid, such as test..testa, following by the spid.

Noteint can be any number, as sp_lock only check to see whether the value of @verbose is null or not.

Examples

Example 1

Shows the lock status of serial processes with spids 7, 18, and 23 and two families of processes. The family with fid 1 has the coordinating processes with spid 1 and worker processes with spids 8, 9, and 10. The family with fid 11 has the coordinating processes with spid 11 and worker processes with spids 12, 13, and 14:

sp_lock
The class column will display the cursor name for locks associated with a
cursor for the current user and the cursor id for other users.

fid spid locktype        table_id  page  dbname  class           context
--- ---- ------------- ---------- ----- ------- --------------  -------
0   7  Sh_intent      480004741     0 master  Non Cursor Lock NULL
0  18  Ex_intent       16003088     0 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088   587 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088   590 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088  1114 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088  1140 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088  1283 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088  1362 pubtune Non Cursor Lock NULL
0  18  Ex_page         16003088  1398 pubtune Non Cursor Lock NULL
0  18  Ex_page-blk     16003088   634 pubtune Non Cursor Lock NULL
0  18  Update_page     16003088  1114 pubtune Non Cursor Lock NULL
0  18  Update_page-blk 16003088   634 pubtune Non Cursor Lock NULL
0  23  Sh_intent       16003088     0 pubtune Non Cursor Lock NULL
0  23  Sh_intent      176003658     0 pubtune Non Cursor Lock NULL
0  23  Ex_intent      208003772     0 pubtune Non Cursor Lock NULL
1   1   Sh_intent     176003658    0  tpcd   Non Cursor Lock Sync-pt
duration request
1   1   Sh_intent-blk 208003772    0  tpcd   Non Cursor Lock Sync-pt
duration request
1   8  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL 
1   9  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL
1  10  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL
11  11   Sh_intent     176003658     0 tpcd   Non Cursor Lock Sync-pt
duration request
11  12  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL 
11  13  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL
11  14  Sh_page        176003658 41571 tpcd    Non Cursor Lock NULL
 

Example 2

Displays information about the locks currently held by spid 7.

sp_lock 7
The class column will display the cursor name for locks associated with a
cursor for the current user and the cursor id for other users.
fid spid locktype   table_id  page dbname  class             context 
--- ---- ---------  --------- ---- ------  ----------------  ----------
 0   7   Sh_intent  480004741    0 master  Non Cursor Lock    NULL

Example 3

First, queries the pubs2 database about the ID of its running processes that currently hold locks (1056003762), then queries the pubs2 database using the @verbose option, which returns the object name (master..spt_values) in addition to the process ID:

1> use pubs2
2> go
1> sp_lock
2> go
The class column will display the cursor name for locks associated with a cursor for the current user and the cursor id for other users.
fid spid loid locktype  table_id   page row dbname class context
--- ---- ---- --------  --------   ---- --- ------ ------ ----------
0     15   30 Sh_intent 1056003762    0   0 master Non Cursor Lock

(1 row affected)
(return status = 0)
1> sp_lock @verbose=0
2> go
The class column will display the cursor name for locks associated with a cursor for the current user and the cursor id for other users.
fid spid loid locktype page row objectName         id       class  context
--- ---- ---- -------- ---- --- ------------------ -------- ------ -------
0     15   30 Sh_intent   0   0  master..spt_values 1056003762 Non Cursor                                                              Lock

(1 row affected)
(return status = 0)

Usage

Permissions

Any user can execute sp_lock.

Auditing

Values in event and extrainfo columns from the sysaudits table are:

Event

Audit option

Command or access audited

Information in extrainfo

38

exec_procedure

Execution of a procedure

  • Roles – Current active roles

  • Keywords or options – NULL

  • Previous value – NULL

  • Current value – NULL

  • Other information – All input parameters

  • Proxy information – Original login name, if set proxy in effect

See also

Commands kill, select

System procedures sp_familylock, sp_who