ORA-12827
        Insufficient number of parallel execution servers (requested servers_requested, available servers_available, PARALLEL_MIN_PERCENT servers_required)
        - servers_requested: The parallel execution servers requested.
- servers_available: The parallel execution servers available.
- servers_required: The minimal percent of parallel execution servers required.
        Cause
        The PARALLEL_MIN_PERCENT parameter is being specified and fewer than the minimum number of parallel execution servers are acquired.
        Action
        Either reprocess the query with a lower PARALLEL_MIN_PERCENT or wait until some running queries complete, freeing up parallel execution servers.
        
     
    
    
        ORA-12827
        insufficient parallel query slaves (requested string, available string, parallel_min_percent string)
        
        
        Cause
        PARALLEL_MIN_PERCENT parameter was specified and fewer than the minimum number of slaves were acquired
        Action
        Either reexecute the query with a lower PARALLEL_MIN_PERCENT or wait until some running queries are completed, thus freeing up slaves
        
     
    
    
        ORA-12827
        insufficient parallel query slaves (requested string, available string, parallel_min_percent string)
        
        
        Cause
        PARALLEL_MIN_PERCENT parameter was specified and fewer than the minimum number of slaves were acquired
        Action
        Either reexecute the query with a lower PARALLEL_MIN_PERCENT or wait until some running queries are completed, thus freeing up slaves