GV$MUTEX_SLEEP definition in Oracle Database 11.2
GV$MUTEX_SLEEP

select
  INST_ID,                                 -- INST_ID NUMBER
  MUTEX_TYPE,                              -- MUTEX_TYPE VARCHAR2(32)
  LOCATION,                                -- LOCATION VARCHAR2(40)
  SLEEPS,                                  -- SLEEPS NUMBER
  WAIT_TIME                                -- WAIT_TIME NUMBER
from
  x$MUTEX_SLEEP
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