My Suggestion What Is Buffer Manager?

The buffer manager manages the functions for reading data or index pages from the database disk files into the buffer cache and writing modified pages back to disk. A page remains in the buffer cache until the buffer manager needs the buffer area to read in more data. Data is written back to disk only if it is modified. Data in the buffer cache can be modified multiple times before being written back to disk.

 

The role of the Buffer Manager is to make page from the disk available to processes into the main memory .