We have a stored procedure that reports on blocking pre SQL 2000-sp4. Since Sp4 came out (we are eventually going to go to sql 2008), it reports on spids that block itself, and inserts much more into the performance database than it needs. We only need to know the differerent SPIDs involved.I'm looking for some help to reduce or eliminate the occurences of self blocking i.e Blocked Spid =80, Blocker Spid=80 (shown in attached image)[img]G:\sp_Block_output.jpg[/img].--If Image doesn't attached here's what the sp_Blocked_Processes output can contain:Blocked_DTTM --Blocked SPID --Blocked Context --Blocker_SPID2012-09-09 80 Update table1 80Attached is an example of the output when running the blocked_processes procedure (which queries the Performance Database with data inserted from sp_Block)Below is the Stored sp_Blocked Stored Procedure, and appreciate any insight and help. CREATE procedure SP_BLOCK @BATCH CHAR(1) = NULL AS-- ***********************************************************************-- This stored procedure is provided AS IS with no warranties and confers no rights.-- ***********************************************************************CREATE TABLE #DBCC( PARENTOBJECT NVARCHAR(128), OBJECT NVARCHAR(128), FIELD NVARCHAR(128), VALUE NVARCHAR(128) )DECLARE @BLOCKED TABLE( BLOCKER_SPID SMALLINT, BLOCKER_CONTEXT VARCHAR(128), BLOCKER_STATUS VARCHAR(18), BLOCKED_SPID SMALLINT, BLOCKED_CONTEXT VARCHAR(128), WAITTIME INT, LOCK_MODE VARCHAR(7), LOCK_TYPE CHAR(3), DBID SMALLINT, LOCK_RESOURCE VARCHAR(30), BLOCKER_SQL TEXT, BLOCKED_SQL TEXT )DECLARE @BLOCKED2 TABLE( BLOCKER_SPID SMALLINT, BLOCKER_CONTEXT VARCHAR(128), BLOCKER_STATUS VARCHAR(18), BLOCKED_SPID SMALLINT, BLOCKED_CONTEXT VARCHAR(128), WAITTIME INT, LOCK_MODE VARCHAR(7), LOCK_TYPE CHAR(3), DBNAME CHAR(8), TABLENAME CHAR(18), INDEXID INT, BLOCKER_SQL TEXT, BLOCKED_SQL TEXT )SET NOCOUNT ONDECLARE @BLOCKER_SPID SMALLINT, @BLOCKER_CONTEXT VARCHAR(128), @BLOCKER_STATUS VARCHAR(18), @BLOCKED_SPID SMALLINT, @BLOCKED_CONTEXT VARCHAR(128), @WAITTIME INT, @LOCK_MODE VARCHAR(7), @LOCK_TYPE CHAR(3), @DBID SMALLINT, @OBJECTID INT, @INDEXID INT, @LOCK_RESOURCE VARCHAR(30), @BLOCKER_HANDLE BINARY(20), @BLOCKER_SQL VARCHAR(8000), @BLOCKED_HANDLE BINARY(20), @BLOCKED_SQL VARCHAR(8000), @CMD VARCHAR(1000), @DELIMITER1 TINYINT, @DELIMITER2 TINYINT, @DELIMITER3 TINYINT, @FILEID VARCHAR(10), @PAGEID VARCHAR(10)-- --------------------------------------------------------------------------------------- Populate temporary table #BLOCKED from sysindexes for blocked and blocking processes-- -------------------------------------------------------------------------------------DECLARE PROCESSES CURSOR FOR SELECT BLOCKER.spid, -- BLOCKER_SPID RTRIM(convert(varchar(128),BLOCKER.context_info)), -- BLOCKER_CONTEXT CASE BLOCKER.blocked -- BLOCKER_STATUS WHEN 0 THEN 'Lead Blocker' ELSE 'In Blocking Chain' END, BLOCKED.spid, -- BLOCKED_SPID RTRIM(convert(varchar(128),BLOCKED.context_info)), -- BLOCKER_CONTEXT BLOCKED.waittime, -- BLOCKED_WAITTIME CASE CONVERT(TINYINT, BLOCKED.waittype) -- LOCK_MODE WHEN 1 THEN 'SCH-ST' WHEN 2 THEN 'SCH-MOD' WHEN 3 THEN 'S' WHEN 4 THEN 'U' WHEN 5 THEN 'X' WHEN 6 THEN 'IS' WHEN 7 THEN 'IU' WHEN 8 THEN 'IX' WHEN 9 THEN 'SIU' WHEN 10 THEN 'SIX' WHEN 11 THEN 'UIX' WHEN 12 THEN 'BU' WHEN 13 THEN 'RangeS-S' WHEN 14 THEN 'RangeS-U' WHEN 15 THEN 'RangeIn-Null' WHEN 16 THEN 'RangeIn-S' WHEN 17 THEN 'RangeIn-U' WHEN 18 THEN 'RangeIn-X' WHEN 19 THEN 'RangeX-S' WHEN 20 THEN 'RangeX-U' WHEN 21 THEN 'RangeX-X' ELSE 'UNKNOWN' END, SUBSTRING(BLOCKED.waitresource,1,3), -- LOCK_RESOURCE_TYPE BLOCKED.dbid, -- DBID SUBSTRING(BLOCKED.waitresource,6,30), -- LOCK_RESOURCE BLOCKER.sql_handle, BLOCKER.cmd, BLOCKED.sql_handle, BLOCKED.cmd FROM master..sysprocesses BLOCKER JOIN master..sysprocesses BLOCKED ON BLOCKER.spid = BLOCKED.blocked WHERE BLOCKED.blocked <> 0 AND BLOCKER.dbid = db_id() OPEN PROCESSES FETCH PROCESSES INTO @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , @DBID , @LOCK_RESOURCE , @BLOCKER_HANDLE , @BLOCKER_SQL , @BLOCKED_HANDLE , @BLOCKED_SQL WHILE @@FETCH_STATUS = 0 BEGIN IF @BLOCKED_HANDLE <> 0x0 AND IS_SRVROLEMEMBER ('sysadmin') = 1 SELECT @BLOCKED_SQL = text from ::fn_get_sql(@BLOCKED_HANDLE) IF @BLOCKER_HANDLE <> 0x0 AND IS_SRVROLEMEMBER ('sysadmin') = 1 SELECT @BLOCKER_SQL = text from ::fn_get_sql(@BLOCKER_HANDLE) INSERT INTO @BLOCKED VALUES( @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , @DBID , @LOCK_RESOURCE , @BLOCKER_SQL , @BLOCKED_SQL) FETCH PROCESSES INTO @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , @DBID , @LOCK_RESOURCE , @BLOCKER_HANDLE , @BLOCKER_SQL , @BLOCKED_HANDLE , @BLOCKED_SQL END -- @@FETCH_STATUS = 0 DEALLOCATE PROCESSES DECLARE BLOCKED CURSOR FOR SELECT BLOCKER_SPID , BLOCKER_CONTEXT , BLOCKER_STATUS , BLOCKED_SPID , BLOCKED_CONTEXT , WAITTIME , LOCK_MODE , LOCK_TYPE , DBID , LOCK_RESOURCE , BLOCKER_SQL , BLOCKED_SQL FROM @BLOCKED OPEN BLOCKED FETCH BLOCKED INTO @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , @DBID , @LOCK_RESOURCE , @BLOCKER_SQL , @BLOCKED_SQL WHILE @@FETCH_STATUS = 0 BEGIN-- --------------------------------------------------------------------------------------- Decode the waitresource column from sysprocesses.-- The 1st 5 bytes have already been trimmed off and stored in LOCK_TYPE-- --------------------------------------------------------------------------------------- Establish position of the delimiters between the fields of the lock-- resource. In order to establish a uniform delimiter to look for, replace ':' with ' '-- ------------------------------------------------------------------------------------- SET @LOCK_RESOURCE = REPLACE(@LOCK_RESOURCE,':',' ') SET @DELIMITER1 = CHARINDEX(' ',@LOCK_RESOURCE) SET @DELIMITER2 = CHARINDEX(' ', @LOCK_RESOURCE, (@DELIMITER1+1)) SET @DELIMITER3 = CHARINDEX(' ', @LOCK_RESOURCE, (@DELIMITER2+1))-- --------------------------------------------------------------------------------------- Delimiter positions are then used to substring fields from @LOCK_RESOURCE-- ------------------------------------------------------------------------------------- IF @LOCK_TYPE IN ('RID','PAG') BEGIN-- --------------------------------------------------------------------------------------- Extract objectid and indexid from file/page for resources of RID or PAG.-- LOCK_RESOURCE_TYPE 'RID': dbid:fileid:pageid:row#-- Example: 7:3:47912:10-- LOCK_RESOURCE_TYPE 'PAG': dbid:fileid:pageid-- Example: 7:3:47912-- ------------------------------------------------------------------------------------- SET @FILEID = SUBSTRING(@LOCK_RESOURCE,@DELIMITER1+1,(@DELIMITER2-@DELIMITER1)-1) SET @PAGEID = SUBSTRING(@LOCK_RESOURCE,@DELIMITER2+1,(@DELIMITER3-@DELIMITER2)-1)-- --------------------------------------------------------------------------------------- Execute DBCC PAGE to determine the object owner of the page. We use the rowset-- version of DBCC (WITH TABLERESULTS) to make it easy to retrieve objext id and index id.-- ------------------------------------------------------------------------------------- SET @CMD = 'DBCC PAGE ('+CONVERT(VARCHAR(3),@DBID)+','+@FILEID+','+@PAGEID+') WITH TABLERESULTS, no_infomsgs' INSERT INTO #DBCC EXEC(@CMD) SELECT @OBJECTID = CONVERT(INT,SUBSTRING(VALUE,1,30)) FROM #DBCC WHERE FIELD = 'm_objId' OPTION(KEEP PLAN) SELECT @INDEXID = CONVERT(INT,SUBSTRING(VALUE,1,30)) FROM #DBCC WHERE FIELD = 'm_indexId' OPTION(KEEP PLAN) TRUNCATE TABLE #DBCC END IF @LOCK_TYPE = 'TAB' BEGIN-- --------------------------------------------------------------------------------------- LOCK_RESOURCE_TYPE 'TAB': dbid:objectid-- Example: 7:1993058136-- ------------------------------------------------------------------------------------- SET @OBJECTID = SUBSTRING(@LOCK_RESOURCE,@DELIMITER1+1,(@DELIMITER2-@DELIMITER1)-1)-- --------------------------------------------------------------------------------------- For table locks, set indexid to '0'-- ------------------------------------------------------------------------------------- SET @INDEXID = 0-- --------------------------------------------------------------------------------------- If the waitresource contains the keyword COMPILE, then the object name is actually a-- stored procedure.-- Example: 6:834102 [[COMPILE]]-- ------------------------------------------------------------------------------------- IF @LOCK_RESOURCE LIKE '%COMPILE%' SET @LOCK_TYPE = 'PRC' END IF @LOCK_TYPE = 'KEY' BEGIN-- --------------------------------------------------------------------------------------- LOCK_RESOURCE_TYPE 'KEY': dbid:objectid:indexid (hash of key value)-- Example: 7:1993058136:4 (0a0087c006b1)-- ------------------------------------------------------------------------------------- SET @OBJECTID = SUBSTRING(@LOCK_RESOURCE,@DELIMITER1+1,(@DELIMITER2-@DELIMITER1)-1) SET @INDEXID = SUBSTRING(@LOCK_RESOURCE,@DELIMITER2+1,(@DELIMITER3-@DELIMITER2)-1) END-- --------------------------------------------------------------------------------------- If executing in batch, write directly to SQLPERF..BLOCKED_PROCESSES-- ------------------------------------------------------------------------------------- IF @BATCH IS NOT NULL INSERT INTO SQLPERF..BLOCKED_PROCESSES WITH (TABLOCKX) VALUES ( GETDATE() , @BLOCKED_SPID , @BLOCKED_CONTEXT , @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @WAITTIME , LEFT(DB_NAME(@DBID),8) , LEFT(OBJECT_NAME(@OBJECTID),18) , @INDEXID , @LOCK_TYPE , @LOCK_MODE , @BLOCKER_SQL , @BLOCKED_SQL) ELSE-- --------------------------------------------------------------------------------------- Otherwise, insert into temp table for subsequent OUTPUT-- ------------------------------------------------------------------------------------- INSERT INTO @BLOCKED2 VALUES ( @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , LEFT(DB_NAME(@DBID),8) , LEFT(OBJECT_NAME(@OBJECTID),18) , @INDEXID , @BLOCKER_SQL , @BLOCKED_SQL) FETCH BLOCKED INTO @BLOCKER_SPID , @BLOCKER_CONTEXT , @BLOCKER_STATUS , @BLOCKED_SPID , @BLOCKED_CONTEXT , @WAITTIME , @LOCK_MODE , @LOCK_TYPE , @DBID , @LOCK_RESOURCE , @BLOCKER_SQL , @BLOCKED_SQL END -- WHILE @@FETCH_STATUS = 0 DEALLOCATE BLOCKED-- --------------------------------------------------------------------------------------- Format output.-- -------------------------------------------------------------------------------------IF @BATCH IS NULL SELECT BLOCKED_DTTM = GETDATE(), BLOCKED_SPID , BLOCKED_CONTEXT, BLOCKER_SPID , BLOCKER_CONTEXT, BLOCKER_STATUS , WAITTIME AS[WAITING(ms)], DBNAME , TABLENAME , INDEXID , LOCK_TYPE , LOCK_MODE , BLOCKER_SQL , BLOCKED_SQL FROM @BLOCKED2 ORDER BY BLOCKER_STATUS desc, [WAITING(ms)] DESCRETURNGO
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