Do you want to know when AlwaysOn failover happened? This is a script which I got from internet and gives good information about the last failovers.
DECLARE @FileName NVARCHAR(4000)
SELECT @FileName = target_data.value('(EventFileTarget/File/@name)', 'nvarchar(4000)')
SELECT CAST(target_data AS XML) target_data
FROM sys.dm_xe_sessions s
JOIN sys.dm_xe_session_targets t
ON s.address = t.event_session_address
WHERE s.name = N'AlwaysOn_health'
SELECT XEData.value('(event/@timestamp)', 'datetime2(3)') AS event_timestamp
,XEData.value('(event/data/text)', 'VARCHAR(255)') AS previous_state
,XEData.value('(event/data/text)', 'VARCHAR(255)') AS current_state
SELECT CAST(event_data AS XML) XEData
FROM sys.fn_xe_file_target_read_file(@FileName, NULL, NULL, NULL)
WHERE object_name = 'availability_replica_state_change'
JOIN sys.availability_replicas ar
ON ar.replica_id = XEData.value('(event/data/value)', 'VARCHAR(255)')
SELECT DATEADD(HOUR, DATEDIFF(HOUR, GETUTCDATE(), GETDATE()), event_timestamp) AS event_timestamp
ORDER BY event_timestamp DESC;
SQL Server Configuration Manager is a snap-in for the Microsoft Management Console program and not a stand-alone program, SQL Server Configuration Manager not does not appear as an application when running Windows 8.
To get into SQL Server Configuration Manager
Start -> Run ->SQLManager11.msc
What is capacity planning?
Capacity planning is used to determine the ever changing needs of an application pro actively. In words of SQL Server, capacity planning of SQL Server is used to determine the capacity of SQL Server , which is used to determine the forthcoming needs of SQL Server corresponding to the growth of business , data, users etc.
Capacity Planning while intial deployment?
Recently when one of my friend Santhosh Balakrishnan who is my colleague in Allianz Managed Operations and Services , opens a question to me regarding the intial capacity planning of SQL Server. The question was “How we will Configure or do the Capacity planning during the intial setup?”. I think question was wonderful, because it makes sense.
The answer to Santhosh question from my point of view is we can collect the requirements from the business for example no of users connect to the system in next 5 or n years , dump data etc and do a load testing for SQL Server. Form the results of Load testing we can will be able to estimate a round figure of what we need for the SQL Server for running in the tested Work load.
Capacity Planning for SQL Server suggestions for Microsoft
Here is the link of the article by Microsoft regarding the SQL Server Capacity Planning. So I am not going write in detail about the SQL Server Capacity Planning. I will try include some scripts for finding the capacity planning in the coming posts.
I like to dedicate this post to my dear friend Santhosh Balakrishnan.