Assume that there are two types of memories: the smaller, more expensive, faster memories and the larger, cheaper, slower memories. Suppose the processor has access to these two levels of memory. If the word that is being accessed is found in the faster memory, the processor directly accesses it, and this is known as a hit. If the word is in the slower memory, the word is first transferred into the faster memory and then accessed by the processor. The latter is known as a miss. In the scenario above, calculate the average time to access a word, given: T1 (time to access faster memory) = 0.1µs T2 (time to access slower memory) = 1µs The time to transfer data between the slower and faster memories can be ignored Hit rate (probability of finding a given word in the faster memory) = 95%

Assume that there are two types of memories: the smaller, more expensive, faster memories and the larger, cheaper, slower memories. Suppose the processor has access to these two levels of memory. If the word that is being accessed is found in the faster memory, the processor directly accesses it, and this is known as a hit. If the word is in the slower memory, the word is first transferred into the faster memory and then accessed by the processor. The latter is known as a miss. In the scenario above, calculate the average time to access a word, given: T1 (time to access faster memory) = 0.1µs T2 (time to access slower memory) = 1µs The time to transfer data between the slower and faster memories can be ignored Hit rate (probability of finding a given word in the faster memory) = 95%

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Computer Fundamentals

The computer is termed computation. For calculating or computing something the device that has been used is known as the computer. Or we can say that for performing a fast arithmetic operation the device that has been used is a computer. Storing, processing, and retrieving are the main features of a computer. 

Question

In the scenario above, calculate the average time to access a word, given.

Assume that there are two types of memories: the smaller, more expensive, faster memories and
the larger, cheaper, slower memories. Suppose the processor has access to these two levels of
memory. If the word that is being accessed is found in the faster memory, the processor directly
accesses it, and this is known as a hit. If the word is in the slower memory, the word is first
transferred into the faster memory and then accessed by the processor. The latter is known as a
miss.
In the scenario above, calculate the average time to access a word, given:
T1 (time to access faster memory) = 0.1µs
T2 (time to access slower memory) = 1µs
The time to transfer data between the slower and faster memories can be ignored
Hit rate (probability of finding a given word in the faster memory) = 95%

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