TempDB is a special database in Microsoft SQL Server that is used to store temporary data. It is created automatically when SQL Server starts and is dropped when SQL Server stops. The size of TempDB is determined by the amount of memory that is available to SQL Server. If TempDB becomes too large, it can cause performance problems.
There are a few reasons why TempDB can become too large. One reason is if there are a lot of long-running queries that are using TempDB. Another reason is if there are a lot of temporary tables that are being created and dropped. Finally, TempDB can become too large if there is a lot of data that is being inserted into and deleted from TempDB.
