Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Explain the concept of "write-back" and "write-through" cache policies in memory management and their impact on system performance.
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- What action should the processor take if it receives a cache request while it is in the process of flushing a block back into main memory from the write buffer?arrow_forwardList the two main principles used in the design of memory hierarchies and explain them briefly. Briefly describe the read algorithm for reading data from a cache.arrow_forwardIn this scenario, the CPU is simultaneously making a cache request and returning a block from the write buffer to main memory.arrow_forward
- Explain the concept of memory swapping in virtual memory systems and how it impacts system performance. What strategies can optimize swapping?arrow_forwardIf a processor request reaches the cache while a write buffer block is being flushed back to main memory, what should happen?arrow_forwardWhat action should be taken by the central processing unit in the event that a cache request is received while a block is being returned from the write buffer to the main memory?arrow_forward
- Explain the concept of "page fault" in virtual memory systems and how it's handled by the operating system.arrow_forwardExplain the importance of memory management units (MMUs) in virtual memory systems. How do they facilitate address translation and protection?arrow_forwardWhat takes happen if a processor makes a request that cannot be satisfied by the cache when it is moving a block back to main memory from the write buffer?arrow_forward
- Explain the concept of virtual memory ballooning and its role in optimizing memory allocation in virtualized environments.arrow_forwardHow should the CPU react if it is unable to satisfy a cache request while writing a block from the write buffer back into main memory?arrow_forwardThe write buffer will return a block to main memory while the CPU submits a cache-unmet request. What may happen next?arrow_forward
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