EBK DATABASE SYSTEM CONCEPTS
7th Edition
ISBN: 9781260049268
Author: SILBERSCHATZ
Publisher: MCG COURSE
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Chapter 10, Problem 12E
Explanation of Solution
Opinions for handling the transaction load:
- Query performance must be improved in a centralized system for handling the transaction load.
- While performing Query processing, the following points must be noted,
-
- ○ Reduce the amount of memory and storage needed for query processing.
- ○ Maximize the throughput which means that the number of requests that are processed in a given amount of time should be increased.
- ○ Query Response Time has to be reduced.
- ○ Memory and Storage needed for processing has to be reduced.
- ○ Avoid Cross Product Operations as they result in huge intermediate tables that will require time for processing.
- ○ Perform restrictive select operations before the other operations.
- Query Optimization is performed by following the below given steps:
-
- ○ Generating Query Tree
- The root of this tree represents the whole query and leaf nodes are the tables of the query...
- ○ Generating Query Tree
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8.4 Self-Bias Configuration
20. Determine Zi. Zo. and A,, for the network of Fig. 8.73 if gf, = 3000 μS and gos = 50 μs.
21. Determine Z, Zo, and A, for the network of Fig. 8.73 if the 20-uF capacitor is removed and the
parameters of the network are the same as in Problem 20. Compare results with those of
Problem 20.
+12 V
3.3 ΚΩ
HE
C₂
Vo
Z
Zo
C₁
10 ΜΩ
Z₁
1.1 ΚΩ
Cs 20 µF
FIG. 8.73
Problems 20, 21, 22, and 59.
21. Determine Zi, Zo, and A, for the network of Fig. 8.73 if the 20-μF capacitor is removed and the
parameters of the network are the same as in Problem 20. Compare results with those of
Problem 20.
+12 V
3.3 ΚΩ
+6
C₂
C₁
Z₁
10 ΜΩ
1.1 ΚΩ
Cs
20 μF
FIG. 8.73
Zo
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