A query is often slow because it has no index or an inefficient index.
查询很慢，因为没有索引或者索引不足够。
Reading through the slow query log is best done with the mysqldumpslow command.
阅读慢速查询日志最好是通过mysqldumpslow命令进行。
Reading through the slow query log is best done with the mysqldumpslow command.
阅读慢速查询日志最好是通过mysqldumpslow命令进行。
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