SMO rowcache

Any idea what the SMO rowcache does?


SQL> l
  1* select * from v$rowcache where cache#=25
SQL> /

    CACHE# TYPE        SUBORDINATE# PARAMETER                             COUNT 
     USAGE      FIXED       GETS
---------- ----------- ------------ -------------------------------- ---------- 
---------- ---------
 GETMISSES      SCANS SCANMISSES SCANCOMPLETES MODIFICATIONS    FLUSHES 
DLM_REQUESTS DLM_CONFLICTS DLM_RELEA
---------- ---------- ---------- ------------- ------------- ---------- 
------------ ------------- -
        25 PARENT                   SMO rowcache                              6 
         6          0    3317241
   3317241          0          0             0             0          0         
   0             0            0

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