A mass delete operates much more efficiently and writes considerably less log information.

mass delete执行起来要高效得多，并且要写的日志信息也更少一些。

youdao

If all rows in a table are deleted (known as a mass delete), all segments become immediately available for reuse at the COMMIT point, without requiring the REORG utility to be executed.

如果一个表中的所有行都被删除(即mass delete)，则在执行COMMIT之际，该表所有的段就立即可以为其他表所用，而不需要执行REORG实用程序。

youdao

Since those triggered actions are typically one or more insert, UPDATE, or DELETE statements, the overhead of triggers can be substantial in a mass insert operation.

由于那些被触发的动作通常是一条或多条insert、UPDATE或delete语句，因此，在数据量很大的insert中，触发器的开销会很大。

youdao