What do MANUAL, DEFERRED and IMMEDIATE mean here?

See the following query. I find the OPER_MODE has the values: MANUAL, DEFERRED and IMMEDIATE
SQL> desc V$MEMORY_RESIZE_OPS
Name                                                                                                      Null?    Type
COMPONENT                                                                                                          VARCHAR2(64)
OPER_TYPE                                                                                                          VARCHAR2(13)
OPER_MODE                                                                                                          VARCHAR2(9)
PARAMETER                                                                                                          VARCHAR2(80)
INITIAL_SIZE                                                                                                       NUMBER
TARGET_SIZE                                                                                                        NUMBER
FINAL_SIZE                                                                                                         NUMBER
STATUS                                                                                                             VARCHAR2(9)
START_TIME                                                                                                         DATE
END_TIME                                                                                                           DATEThe OPER_MODE column have the following values:
* MANUAL
* DEFERRED
* IMMEDIATE
What do MANUAL, DEFERRED and IMMEDIATE mean here?

MANUAL: You as a DBA are responsible for the change, for example because you created a keep cache by specifying DB_KEEP_CACHE_SIZE>0
DEFERRED: MMAN did the change, but it may have taken a while until proceeded, for example a decrease of the shared pool size took some time until enough objects have been aged out.
IMMEDIATE: MMAN did the change because of an emergency case; some component needed to grow in order to let an action proceed, for example a parallel query needs an increases large pool to complete.
Kind regards
Uwe
http://uhesse.wordpress.com

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