11gOCP 1z0-052 :2013-09-13 FAST_START_MTTR_TARGET.........................................A69
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题库答案 BC好象自相矛盾。
答案A不正确,这两参数与SGA顾问器无关。
答案B:正确,当fast_start_mttr_target 默认为0(即没有手工设0)说明是开启了自动检查点,这里mttr顾问器就被禁用了。
答案C不正确,这里的自动检查点是开启的。
如果说显式的设置alter system set FAST_START_MTTR_TARGET=0就是关闭自动调节。默认是开启的自动检查点!!!!
sys@OCM> show parameter mttr
NAME TYPE VALUE
------------------------------------ -----------------------------------------
fast_start_mttr_target integer 0
隐藏参数“_disable_selftune_checkpointing”(Disable self-tune checkpointing )= FALSE
sys@OCM> show parameter dump
NAME TYPE VALUE
------------------------------------ -----------------------------------------
background_core_dump string partial
background_dump_dest string /u01/app/oracle/diag/rdbms/ocm
/ocm/trace
core_dump_dest string /u01/app/oracle/diag/rdbms/ocm
/ocm/cdump
max_dump_file_size string unlimited
shadow_core_dump string partial
user_dump_dest string /u01/app/oracle/diag/rdbms/ocm
/ocm/trace
[root@mydb ~]# su - oracle
[oracle@mydb ~]$ more /u01/app/oracle/diag/rdbms/ocm/ocm/trace/
ARC1 started with pid=25, OS id=10803
Thread 1 opened at log sequence 12
Current log# 3 seq# 12 mem# 0:/u01/app/oracle/oradata/ocm/redo03.log
Successful open of redo thread 1
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Sun Sep 08 14:38:03 2013
ARC2 started with pid=26, OS id=10805
MOS Automatic Checkpoint Tuning in Oracle 10g [ID 265831.1]
答案D不正确的,跟这个参数有关,如果设为ture就会把检查点信息写到aler日志
sys@OCM> show parameter alert
NAME TYPE VALUE
------------------------------------ -----------------------------------------
log_checkpoints_to_alert boolean FALSE
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