An 8K page is the fundamental unit of data storage in SQL Server. SQL Server performs every data modification operation in memory (buffer pool) for performance reasons and does not immediately write it back to disk.
This is where checkpoint comes into play. The Database Engine periodically issues a checkpoint on each database. A checkpoint writes the current in-memory modified pages (known as dirty pages) and transaction log information from memory to disk. It also records this information in the transaction log.
This session will explain why you should care and know about the checkpoint process and the different checkpoints that SQL Server does. I will show you exactly what happens during a checkpoint, how you can influence the interval of checkpoints, and changes made with checkpoint settings in SQL 2014 and SQL 2016+.
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