This document discusses the features of a memory database management system. It provides fast data processing as all data and indexes are stored in memory, allowing for fast access through physical pointers rather than row IDs. However, there is a restriction that the amount of data loaded can only be as much as the available physical memory. The memory DBMS is suitable for online transaction processing due to the elimination of disk I/O performance reductions.

2. Memory DBMS Features
 Fast Data Processing Performance
• Fast data processing is available as all the data and indexes are saved in
memory
• Fast access as memory index is managed by physical pointer not RID
• The performance reduction by disk I/O is unlikely to be occurred
• Suitable for the OLTP type
 There is a restriction that the data can only be loaded as much as the size
of physical memory
MEMORY LAYER
DISK STORAGE LAYER
DATABASE ENGINE
DISK
Tablespace
Memory
Tablespace