How to check db_block_size is a crucial step in understanding and optimizing database performance. It is a database configuration parameter that defines the size of the smallest unit of data that can be read or written to disk. A well-tuned db_block_size can significantly improve database performance by reducing the number of disk I/O operations required to process queries.
The importance of db_block_size lies in its impact on various aspects of database performance. A larger block size can reduce the number of I/O operations, as more data can be transferred in each read or write operation. However, a larger block size also increases the memory overhead required to cache data blocks, which can affect overall system performance. Therefore, it is essential to find an optimal db_block_size that balances these factors.