This lecture covers Oracle database storage structures, focusing on segments, extents, and data blocks. It explains the relationship between logical and physical storage, the importance of block size, and how to configure it for optimal performance. The lecture concludes with a discussion on standard and non-standard block sizes and their implications for database management.

What are segments in a database?

• Collections of tables

• Logical partitions of data

• Objects that may contain rows

• Physical storage units

How are data blocks related to disk blocks?

• Data blocks are larger than disk blocks

• Data blocks are independent of disk blocks

• Data blocks are managed by the operating system

• Data blocks are mapped to disk blocks

What is the purpose of the block header in a data block?

• To allocate free space

• To manage transaction entries

• To store user data

• To define block size

What happens when the PCT FREE limit is reached in a data block?

• The block is compressed

• No more rows can be inserted

• The block is deleted

• The block size is increased

Why is it important to choose the right database block size?

• It affects the database's security

• It impacts the database's IO performance

• It determines the number of tablespaces

• It influences the database's backup speed

What is the default block size for most Oracle databases?

• 4K

• 8K

• 16K

• 32K

What must be configured when using non-standard block sizes?

• Additional data files

• A separate buffer cache

• Extra tablespaces

• More extents