Topic: hugepages that happens at their exhaustion
There is a copy of Oracle 11.2, works under RHEL. It is configured for operation with hugepages. All works, but here there is one parameter in system which guards - hugepages_free. In the course of operation it gradually "thaws". During working off of heavy requests in a DBMS it "thaws" faster.
What happens, if hugepages_free will be settled, becomes equal 0? the Positive dynamics on a reuse of already selected storage it is not visible. And here constant reduction of this parameter says that at some instant possibility receive the next page.