Oracle : Ошибка ORA-02800

"Requests timed out"
*Cause: Some of the requests for asynchronous input or output were not
serviced in the required amount of time.
*Action: If the load on the system is high, it is possible that the
timeout limit is too low. Reset it with sfainit(). If the server
processes are dying due to unexpected signals, this is an
internal error, and ORACLE support should be contacted.

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