Mathematics, 31.08.2021 07:50 iBrain
An article in the Journal of Database Management [“Experimental Study of a Self-Tuning Algorithm for DBMS Buffer Pools” (2005, Vol. 16, pp. 1–20)] provided the workload used in the TPC-C OLTP (Transaction Processing Performance Council’s Version C On-Line Transaction Processing) benchmark, which simulates a typical order entry application.
Transaction Frequency Selects Updates Inserts Deletes Non-Unique Selects Joins
New Order 43 28 11 12 0 0 0
Payment 44 5.9 3 1 0 0.6 0
Order Status 4 5.7 8 0 0 0.6 0
Delivery 5 142 87 0 10 0 0
Stock Level 4 2 4 0 0 0 1
The frequency of each type of transaction (in the second column) can be used as the percentage of each type of transaction. The average number of "selects" operations required for each type of transaction is shown. Let A denote the event of transactions with an average number of selects operations of 12 or fewer. Let B denote the event of transactions with an average number of updates operations of 12 or fewer. Calculate the following probabilities. Round your answers to four decimal places (e. g. 98.7654).
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An article in the Journal of Database Management [“Experimental Study of a Self-Tuning Algorithm for...
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