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Are permanently visible V$LOCK entries with MR, RT, TS and XR enqueue types critical?

April 26, 2017enqueue entries Mr permanently RT TS types visible xr

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Are permanently visible V$LOCK entries with MR, RT, TS and XR enqueue types critical?

1 Answer

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These enqueues are held permanently and are not critical. The REQUEST mode is always 0, which means that a session does not have to wait for one of these enqueues.