单选题

Choose the best answer. Examine this partial report: mysql> SHOW FULL PROCESSLIST;
Examine this query:
SELECT SUM (m.CURRENT_NUMBER_OF_BYTES_USED. AS TOTAL
FROM performance_schema.memory_summary_by_thread_by_event_name m INNER JOIN performance_schema.threads t
ON m.THREAD_ID = t.THREAD_ID WHERE t.PROCESSLIST_ID = 10;
What information does this query provide?

Atotal memory used by connection number 10

Btotal memory used across all connections associated with the user on connection number 10

Ctotal memory used by the first 10 threads

Dtotal memory used by thread number 10

Etotal memory used across all connections associated with the user on thread number 10

Ftotal memory used by the first 10 connections

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正确答案：A （备注：此答案有误）

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