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1. *Brain*: The insect brain is a complex structure that processes sensory information, controls behavior, and integrates information.
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1. *Brain*: The insect brain is a complex structure that processes sensory information, controls behavior, and integrates information.
2. *Ventral nerve cord*: A chain of ganglia (nerve clusters) that runs along the insect's body, controlling movement and sensory processing.
3. *Peripheral nervous system*: Nerves that connect the central nervous system to sensory organs and muscles.
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DatabaseManagement (oracle architecture)
- 2. User Process Server Process dd Database Instances SGA Shared pool Buffer cache Redo Log buffer Java tool Large tool Background Processes Data files Redo log files Control Files Database PGA
- 4. USER PROCESS: A process that runs on the client side and interacts with the Oracle database server. SERVER PROCESS: Oracle Database creates server processes to handle the requests of user processes connected to an instance. PGA (Program Global Area): A memory region that contains data and control information for a server process.
- 5. Instances (ASM and Database separate): An instance is a collection of processes and memory structures that work together to manage a database. ASM (Automatic Storage Management) is a volume manager and file system for Oracle databases System Global Area (SGA) forms the part of the system memory (RAM) shared by all the processes belonging to a single Oracle database instance. The SGA contains all information necessary for the instance operation. Shared pool is the area of the System Global Area (SGA) that contains structures such as the data dictionary cache and the shared SQL area. Database buffer cache, also called the buffer cache, is a memory area in the system global area (SGA) of the database instance. It stores copies of data blocks that are read from data files.
- 6. The Redo log buffer is the part of the System Global Area (SGA) that holds information about changes made to the database. Each of these changes generates a 'redo entry'. Redo entries are needed to reconstruct these changes during the recovery process. Large pool to provide large memory allocations for: Session memory for the shared server and the Oracle XA interface (used where transactions interact with more than one database) Background processes: These are special processes that are started automatically by Oracle when a database instance is started. They perform various background tasks such as I/O, recovery, and memory management. A database is an organized collection of structured information, or data, typically stored electronically in a computer system. A session represents the connection between an application and the relational database that stores its persistent objects.
- 7. THANK YOU !