SSRS Email Subscription Option Missing

SSRS EMAIL SUBSCRIPTION OPTION 

If there is no EMAIL subscription option for the report:

1. Go to SSRS Report services Configuration
2. Choose EMAIL Settings

3. Configure and click Apply.
4. Now go back to report and check subscriptions.

Move System Databases

Here is the steps to move the system databases:
==================================
Master 

- Change the physical location of the files from startup parameters once the SQL Server is offline, then copy and move the MDF and LDF to new location.
- Now rename existing files as old on previous location
-Now bring SQL Server online

MSDB

SELECT name, physical_name FROM sys.master_files WHERE database_id = DB_ID('msdb');
GO

USE master;
GO
ALTER DATABASE msdb
MODIFY FILE (NAME = MSDBData, FILENAME = 'Z:\Data\MSDBData.mdf');
GO
ALTER DATABASE msdb
MODIFY FILE (NAME = MSDBLog, FILENAME = 'Z:\Log\MSDBLog.ldf');
GO

Model

SELECT name, physical_name FROM sys.master_files WHERE database_id = DB_ID(N'model');
GO

USE master;
GO
ALTER DATABASE model
MODIFY FILE (NAME = modeldev, FILENAME = 'Z:\Data\model.mdf');
GO
ALTER DATABASE model
MODIFY FILE (NAME = modellog, FILENAME = 'Z:\SystemDBs\Log\modellog.ldf');
GO

TEMPDB

Use master
GO
SELECT name AS [LogicalName] ,physical_name AS [Location] ,state_desc AS [Status]
FROM sys.master_files WHERE database_id = DB_ID(N'tempdb');
GO

 USE master;
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdev, FILENAME = 'Z:\TempDB\Data\tempdb.mdf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdb2, FILENAME = 'Z:\TempDB\Data\TempDB2.ndf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdb3, FILENAME = 'Z:\TempDB\Data\TempDB3.ndf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdb4, FILENAME = 'Z:\TempDB\Data\TempDB4.ndf');
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = templog, FILENAME = 'Z:\TempDB\Log\templog.ldf');
GO


Resource  DB 

Can I change the Resource database path? Should I?
No

Thanks to :
https://blogs.msdn.microsoft.com/vsanil/2012/11/02/resource-database-common-questions/
https://sqlandme.com/2013/07/08/sql-server-how-to-change-sql-server-errorlog-location/

Unable to open the physical file , operating system error 5. (Access is denied)

Solution:

1. Add permissions to the disk contain Data and Log files
2. Add service account to login with SA
3. Take DB offline
    Alter database DB_NAME set offline with rollback immediate
4. Bring back the DB online
    Alter database DB_NAME set online with rollback immediate

this resolves the issue, else we need to try restarting SQL Services. Worst-case we need to restore the database with latest backup.

SQL 2016 - A severe error occurred on the current command. SQL Server Error Log / SQL Services Not coming online

The SQL Server Error log fails with the below error:

A severe error occurred on the current command.  The results, if any, should be discarded. (Microsoft SQL Server, Error: 0)

Solution 1: Repair SSMS tools of SQL Server 2016.
Solution 2: Repair the SQL Server Instance.

Solution 3: Create alias under SQL Server network configuration.

 =======================================================================

Solution 3 will be more appropriate when we see the below error in windows event viewer along with the above mentioned error.

Severity: 16 Error:-1, OS: -1 [Microsoft][ODBC Driver 13 for SQL Server]SQL Server Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF].

Solution:

https://blog.sqlauthority.com/2016/12/12/sql-server-clustered-instance-online-error-sql-server-network-interfaces-error-locating-serverinstance-specified-xffffffff/

Maximum Worker Thread

About Worker Thread:

When a request is received, SQL Server will try to locate an idle thread to schedule the request. If an idle worker was not located, new worker will be created. If all workers have been created and none is idle, then the request is queued which will be picked up by any worker thread from the pool of worker threads created.

The following table shows the automatically configured number of max worker threads for various combinations of CPUs and versions of SQL Server.

MWT Reference Range:

CPU CORE COUNT	MWT- 32 BIT	MWT-64 BIT
Up-to 4 processors	256	512
Octa-Core 8 processors	288	576
16 processors	352	704
32 processors	480	960
64 processors	736	1472
128 processors	4224	4480
256 processors	8320	8576

-- show Max number of worker threads on the SERVER

select serverproperty('instancename') as instancename, max_workers_count  as 'AllowedOn64Bit' from sys.dm_os_sys_info 

-- show number Current no of worker threads

select serverproperty('instancename') as instancename, COUNT(*) as MAXCOUNT  from sys.dm_os_workers

-- show the THREADPOOL wait time

select * from sys.dm_os_wait_stats where wait_type = 'THREADPOOL'

---- most of the sessions are waiting for LCK_M_S

select * from sys.dm_os_waiting_tasks

SQL Server 2000 - the application failed to start because msvcr71.dll or msvcp71.dll was not found

Error:The application failed to start because msvcr71.dll or  msvcp71.dll  was not found  

These files must be present on C:|Windows\System32 folder and also they should be present on SQL\Binn folder, either any software installation/upgrade /Anti virus might bombed these files.

Solution:

1. Search these files on the computer.
2. Paste them to SQL Binaries folder  - C:\Pf\MS\MSSQL\Binn
3. Paste them to C:\Windows\System32 folder also
4. Bring SQL Services online

Hope it helps someone! Thanks.

SQL Server Agent can't Connect-Comes Online - 2016

ERROR: SQLServerAgent could not be started (reason: Unable to connect to server 'WIN\Group'; SQLServerAgent cannot start).


Solution:

1. Connect to SQL Server Instance
2. Go to SQl Server Agent
3. Select -> right Click -> properties -> choose Connection
4. paste instance name as follows
    servername.domain.biz\instance_name
5. Click ok 

Now go to failover cluster manager and bring agent online. Issue resolved.