它们可用于创建查询，设计或修改数据库结构，或者更新数据。

You can use them to create queries, design or modify a database structure, or update data.

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因此，如果您的应用程序调用具有罕见长事务的文件，根据您的日志设置包含频繁的提交操作，或者更新数据库日志记录参数，也许是好办法。

So if your application calls a file that has unusually long transactions, it may be wise to include frequent commits based upon your log Settings, or to update your database logging parameters.

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检测底层数据的更改，然后从缓存删除更改的数据(使其根据需要重新加载)，或者将更新的数据重新加载到缓存。

Detect changes in the underlying data, and then either evict the changed data from the cache (which will cause it to be reloaded on demand), or reload the updated data into the cache.

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