When does LGWR write

When does LGWR write

 

  

Could someone please settle a debate-

Is one of the conditions that will cause LGWR to write:
"when there is more than a megabyte of changed records in the redo log
buffer"?

An Oracle 8 training manual has this listed, I've never heard this before,
and the Oracle 8.1.6 documentation makes no reference to this.

Thanks

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