List three ways in which caching can be used to speed up Web server performance.
Answer to relevant Questionsa. What are the three broad levels at which a database system can be tuned to improve performance?b. Give two examples of how tuning can be done, for each of the levels.Why the TPCD benchmark was replaced by the TPCH and TPCR benchmarks?Given relation r (a, b, d, d), Show how to use the extended SQL features to generate a histogram of d versus a, dividing a into 20 equal-sized partitions (thatis, where each partition contains 5 percent of the tuples in r, ...Consider the schema depicted in as shown below. Give an SQL: 1999 query to summarize sales numbers and price by store and date, along with the hierarchies on store anddate.Suppose you want to store line segments in an R-tree. If a line segment is not parallel to the axes, the bounding box for it can be large, containing a large empty area.• Describe the effect on performance of having large ...
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