ORA-02855: Number of requests is less than the number of slaves
Cause: The value given for "db_slave_buffers" in your INIT.ORA file is less than the number specified for the number of slaves, "db_slaves."
Action: Specify a number that is greater than that given for "db_slaves" Alternatively, specify 0. The kernel will supply the appropriate number.
ORA-02875
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ORA-02855Number of requests is less than the number of slaves