Hi
I am having very poor performance of redo log in my database.

I normally run long running batch processes on our database.
I am seeing the following:
redo log space requests ===1198
redo log space wait time ===68814


I have my log_buffer set to 5242880
we have only 2 mirrored redo log files of size 200MB.

Should I add more redo log files ? What size?

Any other suggestions appreciated.