在重做日志记录达到缓冲区的三分之一。

The redo log buffer is one-third full or contains 1 MB of buffered data.

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例如如果重做日志缓冲满了，或者有其它的事务提交了。LGWR进程会把所有在重做日志缓冲中的重做日志事项写入重做文件，即使是一些重做记录可能还没有提交。

If the redo log buffer fills, or another transaction commits, LGWR flushes all of the redo log entries in the redo log buffer to a redo log file, even though some redo records may not be committed.

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基本意思如下对于重做记录，在相应的事务被提交之前，也能被写入重做日志文件。

Redo records can also be written to a redo log file before the corresponding transaction is committed.

youdao

基本意思如下对于重做记录，在相应的事务被提交之前，也能被写入重做日志文件。

Redo records can also be written to a redo log file before the corresponding transaction is committed.

youdao