多选题

Choose two.
You are investigating performance problems in a MySQL database; all data fits in memory. You determine that SELECT queries to one table is the main cause for poor response times. Which two have the biggest potential for eliminating the problem?

Ahigh concurrency

Boperating system resources

Ccolumn definitions

Dinnodb mutexes

Enon-transaction storage engine

Ftable indexes

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正确答案：A （备注：此答案有误）

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