redo log sizing

[julian]

I detect small LOG_BUFFER. Tell me first what you get from that query:

select (req.value*5000)/entries.value "Ratio"
from v$sysstat req, v$sysstat entries
where req.name = 'redo log space requests'
and entries.name = 'redo entries';

If you get a number more than 1, let's start with ecreasing the LOG_BUFFER. Set it then to 1M.