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- Improved throughput and resource utilization :Concurrent execution means that CPU doesn't have to be idle while it is waiting for I/O activity to complete. This is because transactions can run in parallel on CPU along with I/O activities. This means that resources can be utilized effectively by having multiple transaction run concurrently.
- Less waiting time : Without concurrency, a short transaction might need to wait for a long transaction to finish causing delay in its execution. With multiple transactions running on the system, new transactions have to wait for less time before getting executed.
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What is a subsystem of a DBMS?
A subsystem of a Database Management System (DBMS) refers to a specialized component that performs a specific function within the overall architecture of the DBMS. Common subsystems include the Storage Management subsystem, which handles data storage and retrieval; the Query Processor, which interprets and executes database queries; and the Transaction Management subsystem, which ensures data integrity and consistency during concurrent operations. Each subsystem works together to provide the functionality and reliability expected from a DBMS.
WHAT TASKS does dbms do?
A Database Management System or DBMS provides the interface between users and a database. Some of its tasks include: data integrity, security, recovery of data, support concurrent updates and update data.
What is concurrency control techniques?
several problems can occur when concurrent transaction execute in an uncontrolled manner.
What is the main four phases of query processing in dbms?
Query processing can be divided into four main phases: decomposition, optimization, code generation, and execution.
What is multi user dbms architechture?
Multi-user DBMS architecture allows multiple users to access and manipulate a database simultaneously. It typically includes a central database server that manages data storage and retrieval, while client applications connect to the server to perform operations. This architecture ensures data consistency and integrity through mechanisms like locking and transaction management, enabling collaborative work without conflicts. It's commonly used in environments such as enterprise applications and online transaction processing systems.
The execution of a user program which interacts with the distributed DBMS ia called?
Transaction
What is View Serializable in DBMS?
View Serializable is a correctness criterion in database management systems that ensures that the final result of executing concurrent transactions is the same as if they were executed one after the other. This property helps maintain data consistency and ensures that the database remains in a consistent state despite concurrent transaction execution. Transactions are said to be view serializable if their interleaved execution produces the same results as if they were executed sequentially.
What are the three most common concurrent transaction execution problems?
The three most common concurrent transaction executive problems are uncommitted data, lost updates, and inconsistent retrievals. It is believed that concurrency control can help these problems.
How do you start and finish a transaction in DBMS?
How do you start and finish a transaction in DBMS?
How does DBMS handle concurrent updates in MySQL?
MySQL is an RDBMS.
What is transaction system in dbms?
any change in database is called transaction.
What allows concurrent access by multiple users in a database?
Primarily it's based on rules about when changes to data are posted in a transaction and read by other users, which are part of the record-locking features of the DBMS. Some DBMS's manage this with undo and redo logs, which support snapshotting the data before the updates were started, so that other users can access the records before the update transaction was started.
Meant of transaction and important limits in DBMS?
Transactions' Importance:Users can submit transaction and can think of each transaction as executing by itself.A transaction might commit after completing all its actions, or it could abort(or be aborted by the DBMS) after executing some actions.
What is control techniques?
several problems can occur when concurrent transaction execute in an uncontrolled manner.
What is a subsystem of a DBMS?
A subsystem of a Database Management System (DBMS) refers to a specialized component that performs a specific function within the overall architecture of the DBMS. Common subsystems include the Storage Management subsystem, which handles data storage and retrieval; the Query Processor, which interprets and executes database queries; and the Transaction Management subsystem, which ensures data integrity and consistency during concurrent operations. Each subsystem works together to provide the functionality and reliability expected from a DBMS.
What is set of steps completed by a dbms to accomplish a single user task?
transaction
What is concurrent schedule in dbms?
A concurrent schedule in DBMS refers to multiple transactions running concurrently without interfering with each other. This allows for improved performance and efficiency in handling multiple operations simultaneously. However, it requires careful management to ensure data consistency and avoid conflicts such as race conditions.
