If you're using MyISAM seriously you can also add the size of Operation System cache you would like MySQL to use for your table.

如果你大量地使用MyISAM表，那么你也可以增加操作系统的缓存空间使得MySQL也能用得着。

youdao

Now, for normal database operation you do not really have to worry about the file system cache because DB2 implements buffer pools that do the necessary caching already.

现在，对于一般的数据库操作，不必考虑文件系统缓存，因为DB 2实现了缓冲池，这些缓冲池已经做了必要的缓存。

youdao

You can determine this empirically (by monitoring the cache contents) or by looking this up in your operation system documentation.

你可以通过监测缓存内容或许查找你的操作系统文档来确定这个时间。

youdao