I heard about maximum 50 Mb/sec for receive and 50Mb/sec for redo. But really, I have only 20Mb/sec redo speed. This is speed from Perfmon, so I know about the following issue:
As I know redo operation depends on CPU and for SQL Server 2012 it's run use only one core of CPU. I think it’s awful for situation when I can generate a lot of logs. For ex. when reorganize a lot of indexes in big tables.
Do you know about any KB or advise for improving performance for this case?