Originally posted by dbafreak

But if these parameters are obselete in 8i, how do we tune? Please advise. Hope someone here is knowledgable about this. Eagerly waiting for the respose.
This isn't absolutly true.
1) LOG_SIMULTANEOUS_COPIES now has name
_LOG_SIMULTANEOUS_COPIES - this is undocumented parameter
and u can increase it.

2) LOG_SMALL_ENTRY_MAX_SIZE is obselete.
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Then u can try use asyncronous io operations on log cache, using parameters:
_LGWR_ASYNC_IO ( set to TRUE)
and
_LGWR_IO_SLAVES (set to 1)
both undocumented.