Blocking Query

  • Experts ,

    Do you have any query which just tell the blocker ,blocked , duration , and why it is blocked ,blocking and type of lock it is placing?

    Thanks!!

  • for a starter this query should help u.

    select * from sys.sysprocesses where blocked0



    Pradeep Singh

  • Hi,

    Along with, PS correct approach, the DBCC inputbuffer shows the contents of

    sp/table/.. against the SPID

    ARUN SAS

  • Thanks , do we have combination of above two to give exact in same query?

  • Also use SP_WHO2 command to know more about the process that is blocking and got blocked.

  • Try

    SELECT (SELECT name FROM sys.dm_exec_sql_text(sql_handle) a JOIN DATABASENAME.sys.all_objects b ON a.objectid = b.object_id),

    (SELECT substring(text, stmt_start/2,

    ((case when stmt_end = -1 then

    (len(convert(nvarchar(max), text)) * 2)

    else

    stmt_end

    end) - stmt_start) / 2) FROM sys.dm_exec_sql_text(sql_handle)),

    *

    FROM sys.sysprocesses

    WHERE (blocked 0 OR spid IN (SELECT blocked FROM sys.sysprocesses))

    AND dbid = db_id('DATABASENAME')

    From http://itknowledgeexchange.techtarget.com/sql-server/handy-script-for-use-when-looking-at-blocking/

  • Some of those views are deprecated in 2008. Get used to using DMV's for this type of data. Here's a script from Technet

    select

    t1.resource_type,

    'database'=db_name(resource_database_id),

    'blk object' = t1.resource_associated_entity_id,

    t1.request_mode,

    t1.request_session_id,

    t2.blocking_session_id

    from

    sys.dm_tran_locks as t1,

    sys.dm_os_waiting_tasks as t2

    where

    t1.lock_owner_address = t2.resource_address and

    t1.request_session_id = isnull(@spid,t1.request_session_id)

    "The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
    - Theodore Roosevelt

    Author of:
    SQL Server Execution Plans
    SQL Server Query Performance Tuning

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