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System Configuration Check – Without Starting SQL Server Installation

Question : Can we do system configuration check with starting SQL Server installation? One of my friend need to submit it to get installation approval. This is to ensure that no configuration issue occur at time of installation.

Answer : Yes, We can do it.

Step 1: Run Setup.exe

Step 2 : Go to Tool & click “System Configuration Checker”

Step 3 : You are done, You got configuration report. You can ignore the warnings But for healthy system start only on 100% green.

Support : It support SQL Server 2008/2008 R2/2012.

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Reference : Rohit Garg (http://mssqlfun.com/)

Cumulative Update – 8 for SQL Server 2012 Service Pack 1 Is Now Available !

The 8th cumulative update release for SQL Server 2012 Service Pack 1 is now available. Cumulative Update 8 contains all the hotfixes released since the initial release of SQL Server 2012 SP1.

Those who are facing severe issues with their environment, they can plan to test CU8 in test environment & then move to Production after satisfactory results.

To other, I suggest to wait for SP2 final release to deploy on your production environment, to have consolidate build.

KB Article For CU8 of SQL Server 2012 SP1

§ CU#8 KB Article: http://support.microsoft.com/kb/2917531

Previous Cumulative Update KB Articles of SQL Server 2012 SP1

§ CU#7 KB Article: http://support.microsoft.com/kb/2894115

§ CU#6 KB Article: http://support.microsoft.com/kb/2874879

§ CU#5 KB Article: http://support.microsoft.com/kb/2861107

§ CU#4 KB Article: http://support.microsoft.com/kb/2833645

§ CU#3 KB Article: http://support.microsoft.com/kb/2812412

§ CU#2 KB Article: http://support.microsoft.com/kb/2790947

§ CU#1 KB Article: http://support.microsoft.com/kb/2765331

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Reference : Rohit Garg (http://mssqlfun.com/)

Database Snapshot failed due to disk space issue

Database snapshot is really a useful feature. As we know, Snapshot database file will keep increasing parallel to the DML operations on database. But if disk containing snapshot file run out of space then what will be the impact on new transactions, database & snapshot?

Microsoft design snapshot in very well manner. If Snapshot failed to records the data changed by DML transaction due to disk space issue then your snapshot will become unusable & reaches to suspect mode and on the other hand your actual database will keep running un-impacted.

Snapshot database cannot be recovered from suspect state so you need to drop & recreate the snapshot database.

1) While running below transaction, We got error that unable to write on snapshot file due to disk space issue.

2) We check data in table to check id transaction completed successfully or failed due to snapshot issue. We found transaction is completed & database is running fine.

3) After that, When we try to select snapshot database, We got error that database is suspect mode.

4) We also try to bring snapshot database in emergency mode to see if we can troubleshoot it but We got error that this operation can not be performed on snapshot database.

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Reference : Rohit Garg (http://mssqlfun.com/)

Cumulative Update – 10 for SQL Server 2012 RTM Is Now Available !

The 10th cumulative update release for SQL Server 2012 RTM is now available. Cumulative Update 10 contains all the hotfixes released since the initial release of SQL Server 2012 RTM.

Those who are facing severe issues with their environment, they can plan to test CU10 in test environment & then move to Production after satisfactory results.

KB Article For CU9 of SQL Server 2012

· CU#10 KB Article: http://support.microsoft.com/kb/2891666

Previous Cumulative Update KB Articles of SQL Server 2012

· CU#9 KB Article: http://support.microsoft.com/kb/2867319

· CU#8 KB Article: http://support.microsoft.com/kb/2844205

· CU#7 KB Article: http://support.microsoft.com/kb/2823247

· CU#6 KB Article: http://support.microsoft.com/kb/2728897

· CU#5 KB Article: http://support.microsoft.com/kb/2777772

· CU#4 KB Article: http://support.microsoft.com/kb/2758687

· CU#3 KB Article: http://support.microsoft.com/kb/2723749

· CU#2 KB Article: http://support.microsoft.com/kb/2703275

· CU#1 KB Article: http://support.microsoft.com/kb/2679368

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Reference : Rohit Garg (http://mssqlfun.com/)

DMV-15 : Pending I/O requests……..sys.dm_io_pending_io_requests

sys.dm_io_pending_io_requests DMV (Dynamic Management View), described by BOL as follows: http://msdn.microsoft.com/en-us/library/ms188762.aspx

Returns a row for each pending I/O request in SQL Server.

It’s a very simple DMV used to see all pending I/O requests & there description.

You can combine this DMV with DMF – sys.dm_io_virtual_file_stats to see I/O pending requests with database files. You should run this query multiple times to check if the same files or drive letters consistently coming up on the top. If this is the case that means you facing I/O bottlenecks for that file or drive letter.

Query 1 : Details of I/O pending requests against each DB file

SELECT

DB_NAME(MF.DATABASE_ID) AS [DATABASE],

MF.PHYSICAL_NAME,

IPIR.IO_TYPE,

SUM(IPIR.IO_PENDING) TOTAL_PENDING_IO,

SUM(IPIR.IO_PENDING_MS_TICKS) TOTAL_PENDING_MS_TICKS,

SUM(VFS.NUM_OF_READS) TOTAL_READS,

SUM(VFS.NUM_OF_WRITES) TOTAL_WRITES

FROM

SYS.DM_IO_PENDING_IO_REQUESTS AS IPIR

INNER JOIN

SYS.DM_IO_VIRTUAL_FILE_STATS(NULL,NULL) AS VFS

ON IPIR.IO_HANDLE = VFS.FILE_HANDLE

INNER JOIN

SYS.MASTER_FILES AS MF

ON VFS.DATABASE_ID = MF.DATABASE_ID

AND VFS.FILE_ID = MF.FILE_ID

GROUP BY MF.DATABASE_ID, MF.PHYSICAL_NAME, IPIR.IO_TYPE

ORDER BY SUM(IPIR.IO_PENDING)

Remarks

1. To use this DMV, User required VIEW SERVER STATE permission on the server.

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Reference : Rohit Garg (http://mssqlfun.com/)

Cumulative Update – 6 for SQL Server 2012 Service Pack 1 Is Now Available !

The 6th cumulative update release for SQL Server 2012 Service Pack 1 is now available. Cumulative Update 6 contains all the hotfixes released since the initial release of SQL Server 2012 SP1.

Those who are facing severe issues with their environment, they can plan to test CU6 in test environment & then move to Production after satisfactory results.

To other, I suggest to wait for SP2 final release to deploy on your production environment, to have consolidate build.

KB Article For CU6 of SQL Server 2012 SP1

§ CU#6 KB Article: http://support.microsoft.com/kb/2874879

Previous Cumulative Update KB Articles of SQL Server 2012 SP1

§ CU#5 KB Article: http://support.microsoft.com/kb/2861107

§ CU#4 KB Article: http://support.microsoft.com/kb/2833645

§ CU#3 KB Article: http://support.microsoft.com/kb/2812412

§ CU#2 KB Article: http://support.microsoft.com/kb/2790947

§ CU#1 KB Article: http://support.microsoft.com/kb/2765331

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Reference : Rohit Garg (http://mssqlfun.com/)

How to Check SQL Server Evaluation Version Expire Date ?

SQL Server Evaluation Edition is available free of cost. It’s a trial version & valid for limited time of period. The expiration date is always 180 days from the initial installation date.

The following query will give you the expiration date of evaluation instance :

SELECT

@@SERVERNAME SERVERNAME,

CREATE_DATE ‘INSTALALTIONDATE’,

SERVERPROPERTY(‘EDITION’) ‘Version’,

DATEADD(DD, 180, CREATE_DATE) AS ‘EXPIRY DATE’

FROM SYS.SERVER_PRINCIPALS

WHERE SID = 0X010100000000000512000000

SID 0X010100000000000512000000 is associated with login “NT AUTHORITYSYSTEM” & which is created at the time of installation only.

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Reference : Rohit Garg (http://mssqlfun.com/)

DMV-14 : Which Table has Max. rows & Size……..sys.dm_db_partition_stats

sys.dm_db_partition_stats DMV (Dynamic Management View), described by BOL as follows: http://msdn.microsoft.com/en-us/library/ms187737.aspx

Returns page and row-count information for every partition in the current database.

This DMV gives useful information about rowcount, free & reserved space of each table in database. It can be used for analysis purpose while adding new indexes, doing index Maintenance or checking the biggest table of database.

Query 1 : Details of table with row count & space used

SELECT

SS.NAME AS SCHEMANAME,

SO.NAME AS OBJECTNAME,

SI.NAME AS INDEXNAME,

PS.RESERVED_PAGE_COUNT*8 TOTAL_SPACE_CONSUMED_KB,

PS.USED_PAGE_COUNT*8 USED_SPACE_KB,

(PS.RESERVED_PAGE_COUNT – PS.USED_PAGE_COUNT)*8 FREE_SPACE_KB,

CASE

WHEN PS.INDEX_ID IN (0,1) THEN PS.ROW_COUNT

ELSE NULL

END AS ROW_COUNT

FROM

SYS.DM_DB_PARTITION_STATS PS

INNER JOIN SYS.OBJECTS SO ON SO.OBJECT_ID = PS.OBJECT_ID

INNER JOIN SYS.SCHEMAS SS ON SS.SCHEMA_ID = SO.SCHEMA_ID

LEFT JOIN SYS.INDEXES SI ON SI.OBJECT_ID = PS.OBJECT_ID

AND SI.INDEX_ID = PS.INDEX_ID

WHERE

SO.IS_MS_SHIPPED = 0

Sample Result

Remarks

1. To use this DMV, User required VIEW DATABASE STATE permission on the server.

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Reference : Rohit Garg (http://mssqlfun.com/)

Cumulative Update – 9 for SQL Server 2012 RTM Is Now Available !

The 9th cumulative update release for SQL Server 2012 RTM is now available. Cumulative Update 9 contains all the hotfixes released since the initial release of SQL Server 2012 RTM.

Those who are facing severe issues with their environment, they can plan to test CU9 in test environment & then move to Production after satisfactory results.

KB Article For CU9 of SQL Server 2012

· CU#9 KB Article: http://support.microsoft.com/kb/2867319

Previous Cumulative Update KB Articles of SQL Server 2012

· CU#8 KB Article: http://support.microsoft.com/kb/2844205

· CU#7 KB Article: http://support.microsoft.com/kb/2823247

· CU#6 KB Article: http://support.microsoft.com/kb/2728897

· CU#5 KB Article: http://support.microsoft.com/kb/2777772

· CU#4 KB Article: http://support.microsoft.com/kb/2758687

· CU#3 KB Article: http://support.microsoft.com/kb/2723749

· CU#2 KB Article: http://support.microsoft.com/kb/2703275

· CU#1 KB Article: http://support.microsoft.com/kb/2679368

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Reference : Rohit Garg (http://mssqlfun.com/)

DMV-13 : Finding locking & blocking……..sys.dm_tran_locks

sys.dm_tran_locks DMV (Dynamic Management View), described by BOL as follows: http://msdn.microsoft.com/en-us/library/ms190345.aspx

Returns information about currently active lock manager resources. Each row represents a currently active request to the lock manager for a lock that has been granted or is waiting to be granted.

The columns in the result set are divided into two main groups: resource and request. The resource group describes the resource on which the lock request is being made, and the request group describes the lock request.

This DMV is very useful in helping to identify locking and blocking issues on your data­base instances.

Query 1 : Details of currently active locks

SELECT

CASE DTL.REQUEST_SESSION_ID

WHEN -2 THEN ‘ORPHANED DISTRIBUTED TRANSACTION’

WHEN -3 THEN ‘DEFERRED RECOVERY TRANSACTION’

ELSE DTL.REQUEST_SESSION_ID END AS SPID,

DB_NAME(DTL.RESOURCE_DATABASE_ID) AS DATABASENAME,

SO.NAME AS LOCKEDOBJECTNAME,

DTL.RESOURCE_TYPE AS LOCKEDRESOURCE,

DTL.REQUEST_MODE AS LOCKTYPE,

ST.TEXT AS SQLSTATEMENTTEXT,

ES.LOGIN_NAME AS LOGINNAME,

ES.HOST_NAME AS HOSTNAME,

CASE TST.IS_USER_TRANSACTION

WHEN 0 THEN ‘SYSTEM TRANSACTION’

WHEN 1 THEN ‘USER TRANSACTION’ END AS USER_OR_SYSTEM_TRANSACTION,

AT.NAME AS TRANSACTIONNAME,

DTL.REQUEST_STATUS

FROM

SYS.DM_TRAN_LOCKS DTL

JOIN SYS.PARTITIONS SP ON SP.HOBT_ID = DTL.RESOURCE_ASSOCIATED_ENTITY_ID

JOIN SYS.OBJECTS SO ON SO.OBJECT_ID = SP.OBJECT_ID

JOIN SYS.DM_EXEC_SESSIONS ES ON ES.SESSION_ID = DTL.REQUEST_SESSION_ID

JOIN SYS.DM_TRAN_SESSION_TRANSACTIONS TST ON ES.SESSION_ID = TST.SESSION_ID

JOIN SYS.DM_TRAN_ACTIVE_TRANSACTIONS AT ON TST.TRANSACTION_ID = AT.TRANSACTION_ID

JOIN SYS.DM_EXEC_CONNECTIONS EC ON EC.SESSION_ID = ES.SESSION_ID

CROSS APPLY SYS.DM_EXEC_SQL_TEXT(EC.MOST_RECENT_SQL_HANDLE) AS ST

WHERE

RESOURCE_DATABASE_ID = DB_ID()

ORDER BY DTL.REQUEST_SESSION_ID

Sample Result

Remarks

1. Column request_session_id display the session ID owns the lock or raise request.

If value display is -2 indicates that the request belongs to an orphaned distributed transaction.

If value display is -3 indicates that the request belongs to a deferred recovery transaction, such as, a transaction for which a rollback has been deferred at recovery because the rollback could not be completed successfully.

2. Column request_owner_type details :-

· TRANSACTION = The request is owned by a transaction.

· CURSOR = The request is owned by a cursor.

· SESSION = The request is owned by a user session.

· SHARED_TRANSACTION_WORKSPACE = The request is owned by the shared part of the transaction workspace.

· EXCLUSIVE_TRANSACTION_WORKSPACE = The request is owned by the exclusive part of the transaction workspace.

· NOTIFICATION_OBJECT = The request is owned by an internal SQL Server component.

3. To use this DMV, User required VIEW SERVER STATE permission on the server.

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Reference : Rohit Garg (http://mssqlfun.com/)

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