SQL Padawan

Locks everywhere

In this post I’m going to talk about locks on SQL Server. Locks are necessary, they are used in all

I was talking with a friend about how a database works and she asked me to explain transaction isolation levels

In a previous post I talked about transaction log works, and what about using a memory-optimized table? SQL Server has

Checkpoints flush dirty data pages from the buffer cache of the current database to disk. This minimizes the active portion

To see how many VLFs you have solely look at the number of rows returned by DBCC LOGINFO. The size

Doing crash and recovery tests on my local machine I got the SQL Server instance not going online. After trying

What is Query Store? Query Store is a tool to troubleshoot query performance by capturing a range of information about

One more undocumented function/commands. The fn_dump_dblog function is used to read transaction logs from a log backup file. This is

Every database has a transaction log that records all transactions and the database modifications made by each transaction The transaction

Let’s talk about why we have to wait and how to understand the wait types. Paul Randal in his post