Oracle Error Message
ORA-27136: MPMT and VLM are both enabled
Reason for the Error
When the _mpmt_enabled parameter is set to TRUE, none of the following parameters should be set to TRUE:
* use_indirect_buffers
* _db_block_cache_protect
* _db_block_cache_clone
Solution
Either turn off Multi Process Multi Threads (MPMT) or turn off all the other parameters.