Administration

External Article

Partition offset and allocation unit size of a disk for SQL Server

  • Article

SQL Server performance is dependent on the server resources available and disk performance is probably the most important resource. To maximize disk performance for SQL Server, I've always been told that the drive's partition offset must be set to 32K and the allocation unit size set to 64K for partitions that hold data and 8K for partitions that hold logs. How do I find out the allocation unit size and partition offset for my drives?

2010-09-29

3,355 reads

Technical Article

SQL Server restart validation checklist

  • Article

Many times there is the need to restart the SQL Server services, this could be a reboot of the server after patching, service pack installation or due to some other reason. Sometimes we may face issues after the restart for example the SPN is not registered, a database is offline etc... For the solution you can use the below standard SQL Server validation checklist after you restart your SQL services.

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2010-08-09

3,617 reads

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Question of the Day

Fun with JSON I

I have some data in a table:

CREATE TABLE #test_data
(
    id INT PRIMARY KEY,
    name VARCHAR(100),
    birth_date DATE
);

-- Step 2: Insert rows  
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
     (
         SELECT t.* FROM #test_data AS t FOR JSON PATH
     )
             ) t;

See possible answers