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[多选] Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application,which heavily reads and writes data.This requires the following config file options:完全原子性、一致性、隔离性、持久性(ACID)遵从性对于一个读写量很大的新应用程序来说是必要的数据。这个需要以下配置文件选项:However, this configuration is expected to introduce disk I/O overhead.但是,这种配置预计会带来磁盘I/O开销。What three changes will reduce disk I/O overheads?()哪三项更改将减少磁盘I/O开销?
A.Use of soft links for database directories on the same physical disk B.Use of separate directories on the same physical disk for log files and data files 在同一物理磁盘上为日志文件和数据文件使用不同的目录 C.Placement of InnoDB log files and datadir on separate physical disks 在不同的物理磁盘上放置InnoDB日志文件和datadir D.Allocation of RAM to the buffer pool such that more of the data can fit in RAM 将RAM分配到缓冲池中,以便在RAM中容纳更多的数据 E.Use of delay_key_write=ON for batch index update 使用delay_key_write=ON进行批量索引更新
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