How does the DBWR process interact with the buffer cache and datafiles?

 The Database Writer (DBWR) process is a crucial background process in Oracle databases that manages the writing of data from the buffer cache to the datafiles. Here's a breakdown of its interaction:   

DB Buffer Cache:

• The buffer cache is a portion of the System Global Area (SGA) that holds data blocks read from the datafiles. It serves as a temporary storage for frequently accessed data, improving database performance by reducing physical I/O operations.