Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 10, Problem 2P
Explanation of Solution
Concurrency control:
The purpose of concurrency control is to ensure the serializability of transaction in a multiuser
Common problems with concurrent transaction execution:
Concurrency transaction is one or more transactions are processed on same time. During the concurrency transaction execution the following problems can occur in the transaction. They are:
- Lost updates
- Uncommitted data
- Inconsistent retrievals
Lost updates:
A data can be lost when the two different transactions want to update same field or row within the database at the same time.
- For example: if the transactions “T1” and “T2” want to update the same element and one of the updates is lost or overwritten by other transactions.
Uncommitted data:
The data of the transactions are not committed when the transactions are executed concurrently...
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Describe the three most common problems with concurrent transaction execution.Explain how concurrency control can be used to avoid those problems.
Describe the three most common concurrent transaction execution problems. Explain how concurrency control can be used to avoid those problems.
Explain the three most prevalent problems with concurrent transaction execution. Explain how you can avoid these issues by using concurrency control.
Chapter 10 Solutions
Database Systems: Design, Implementation, & Management
Ch. 10 - Prob. 1RQCh. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - Prob. 8RQCh. 10 - Prob. 9RQCh. 10 - Prob. 10RQ
Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Prob. 16RQCh. 10 - Prob. 17RQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11P
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- List the top three problems that arise from processing transactions simultaneously. Explain how concurrency control can help solve these problems?arrow_forwardName the top three issues that emerge while simultaneously processing transactions. Demonstrate how concurrency control may be used to avoid these issues.arrow_forwardExplain three common problems with concurrent transaction execution and how concurrency control can be used to avoid them. Describe an example that illustrates either: A problem with concurrent transaction execution and its effects on the operational performance of the system The effectiveness of concurrency controlarrow_forward
- Determine the top three problems that arise from processing transactions simultaneously. Exhibit how concurrency management may help these problems be avoided.arrow_forwardI want you to name the top three issues that emerge while dealing with transactions all at once. Demonstrate how these issues might be avoided via the use of concurrency control.arrow_forwardDiscuss the concept of "isolation levels" in concurrency control. Provide examples of different isolation levels and their effects on concurrent transactions.arrow_forward
- Explain three frequent issues with concurrent transaction execution and how concurrency control may help you avoid them. Describe an example that exemplifies either: A difficulty with concurrent transaction processing and its impact on the system's operational performance The efficacy of concurrency controlarrow_forwardDescribe the concept of transaction isolation levels in the context of concurrency control and provide examples of when each level might be appropriate.arrow_forwardThe implementation of an optimistic concurrency control strategy frequently results in the postponement of transactions. Explain?arrow_forward
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