Explain how the “Database Writer” process works?

It’s feasible to run several database context processes. They’re known as “DBWn” in the operating system. This technique is responsible for storing “dirty” buffers on the hard drive. When a server process has to update a data block, it reads it from the disc into the buffer cache if it isn’t already there, then updates the cache copy. As a result, a “dirty” block in the buffer cache corresponds to a changed database block.