Most of the file systems communicate through a buffer cache, which is a cache that optimizes access to the physical devices by caching recently touched data.
大多数文件系统都通过缓冲区缓存来相互通信，这种缓存通过缓存最近使用的数据来优化对物理设备的访问。
DB2 USES buffer pools to cache the table and index data as they are being read or written to the hard disk drive.
当从硬盘驱动器读写表和索引数据时，DB 2使用缓冲池来缓存它们。
The loss of this data might cause the database to become overloaded, as the cache is no longer acting as a buffer for that subset of the data.
数据的丢失可能造成数据库负荷过多，因为缓存不再充当数据子集的缓冲区。
Using the intermediate buffer on the read side allows the kernel buffer to act as a "readahead cache" when the application hasn't asked for as much data as the kernel buffer holds.
在读取方面使用中间内核缓冲区，可以允许内核缓冲区在应用程序不需要内核缓冲区内的全部数据时，充当 “预读高速缓存（readahead cache）” 的角色。
mytop also provides real-time and historical data about key-buffer and query-cache efficiency, and statistics about the queries being run.
mytop还提供了一个有关关键字缓冲区和查询缓存效率的实时数据和历史数据，以及有关正在运行的查询的统计信息。
Note that you can use the sync command to flush the buffer cache out to the storage media (force all unwritten data out to the device drivers and, subsequently, to the storage device).
注意，可以使用sync命令将缓冲区缓存中的请求发送到存储媒体(迫使所有未写的数据发送到设备驱动程序，进而发送到存储设备)。
Note that you can use the sync command to flush the buffer cache out to the storage media (force all unwritten data out to the device drivers and, subsequently, to the storage device).
注意，可以使用sync命令将缓冲区缓存中的请求发送到存储媒体(迫使所有未写的数据发送到设备驱动程序，进而发送到存储设备)。
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