Immediately after adding a new disk to or removing an existing disk from an Automatic StorageManagement （ASM） instance， you find that the performance of the database decreases initially， until the addition or removal process is completed. Performance then gradually returns to normal levels. 
Which two activities could you perform to maintain a consistent performance of the database while adding or removing disks？（）

单项选择题You execute the following command to enable a session in resumable mode：  SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60；  What is the impact of a timeout on the statements being suspended？（）

A.The statements remain suspended for at least 60 seconds.
B.The statements are suspended for 60 seconds and then they are executed.
C.The suspended statements error out if the problem is not rectified within 60 seconds.
D.The statements are automatically suspended 60 seconds after an error is received， and then attempt toexecute normally again.

单项选择题The SPFILE for the PROD database specifies the following initialization parameter values：   SGA_TARGET = 2G   DB_8K_CACHE_SIZE = 128M   You create a tablespace named HR with the non-standard block size of 8K. Four database users are running queries on a table in the HR tablespace. These users complain that the queries are taking longer than usual to complete. While investigating the reasons for this delay， you discover that the database encounters extensive cache misses on the database buffer cache with the block size of 8K. You issue the following statement to increase the value of the DB_8K_CACHE_SIZE initialization parameter to 256M：   SQL>ALTER SYSTEM SET DB_8K_CACHE_SIZE=256M SCOPE = BOTH；   What is the result of this statement？（）

A. The statement fails because you cannot set the memory components manually if the SGA_TARGET initialization parameter is set to a nonzero value.
B. The statement fails because the DB_8K_CACHE_SIZE initialization parameter is not a dynamic parameter.
C. The statement increases the value of the DB_8K_CACHE_SIZE initialization parameter to 256M and extracts an additional 128M of memory from the automatically sized memory components.
D. The statement increases the value of the DB_8K_CACHE_SIZE initialization parameter to 256M and reallocates an additional 128M memory from the memory components that are not auto-tuned.

单项选择题You recently created a database and configured the SPFILE with the following parameter settings to ensure that Oracle automatically adjusts the memory for the Program Global Area （PGA）：   SORT_AREA_SIZE = 150M   HASH_AREA_SIZE = 150M   BITMAP_MERGE_AREA_SIZE = 150M   CREATE_BITMAP_AREA_SIZE = 150M   WORKAREA_SIZE_POLICY = AUTO   You have not included the PGA_AGGREGATE_TARGET initialization parameter in the SPFILE and the System Global Area （SGA） is currently sized at 4G.   What is the total PGA memory allocated across all database server processes？（）

A. 10M
B. 400M
C. 600M
D. 800M

单项选择题You recently added a third-party application to your database and do not have access to the SQL code of this application. Database users are complaining of performance-related issues， such as increased time required to complete a query. While investigating， you discover from the STATSPACK utility that some of the memory structures have low hit ratios. You plan to resize some of the memory structures by using the Memory Advisor. For which memory structure will you fail to obtain optimal settings by using the Memory Advisor？（）

A. java pool
B. shared pool
C. buffer cache
D. program global area

多项选择题YouareenablingtheAutomaticSharedMemoryManagementfeatureintheOracleDatabase10gtoensurethattheimportantmemorystructuresoftheSystemGlobalArea（SGA）areautomaticallyadjusteddependingonthedatabaseworkload.YouareusingEnterpriseManager10gtoenablethisfeature.YouarecurrentlyontheAdministrationtabpage. WhichtwolinksshouldyouclicktogototheMemoryAdvisorpage？（）

A. Advisor Central
B. Global Attributes
C. Resource Monitors
D. Memory Parameters
E. Database Usage Statistics
F. All Initialization Parameters
G. Automatic Workload Repository