Oracle : Ошибка ORA-07721

"scgcm: not enough OS resource to obtain system enqueue"
*Cause: A call to sys$enq returned an error indicating that the operating
system lacked the resources necessary to create a lock. This is
caused by the messages SS$_EXENQLM or SS$_INSFMEM.
*Action: Free up some of the required resource to allow the creation of the
required lock.

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