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1:修改MTR: parallel_query.pq_memory_limit parallel_query.pq_kill_query parallel_query.pq_mq_error parallel_query.pq_worker_error parallel_query.pq_abort
2:执行show status like "PQ_memory_used";语句时,该语句不支持并行,但是判断该语句是否执行并行时,开辟了并行内存,导致显示结果不正确,把判断过程中用到的内存,改为普通内存。
fixes:#77