admin管理员组文章数量:1647562
74.Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find
that the performance of the database goes down initially until the time the addition or removal process is
completed, and then gradually becomes normal.
Which two activities would you perform to maintain a consistent performance of the database while
adding or removing disks? (Choose two.)
A. Define the POWER option while adding or removing the disks.
B. Increase the number of ARB processes by setting up a higher value for ASM_POWER_LIMIT.
C. Increase the number of DBWR processes by setting up a higher value for
DB_WRITER_PROCESSES.
D. Increase the number of slave database writer processes by setting up a higher value for
DBWR_IO_SLAVES.
Answer: AB
答案解析:
参考:http://docs.oracle/cd/E11882_01/server.112/e18951/asmdiskgrps.htm#OSTMG94118
Manually Rebalancing Disk Groups
You can manually rebalance the files in a disk group using the REBALANCE
clause of the ALTER DISKGROUP
statement. This would normally not be required, because Oracle ASM automatically rebalances disk groups when their configuration changes. You might want to do a manual rebalance operation to control the speed of what would otherwise be an automatic rebalance operation.
The POWER
clause of the ALTER
DISKGROUP
... REBALANCE
statement specifies the degree of parallelism, and thus the speed of the rebalance operation. It can be set to a minimum value of 0 which halts a rebalancing operation until the statement is either implicitly or explicitly re-run. A higher value increases the speed of the rebalance operation.
Example 4-9 Manually rebalancing a disk group
ALTER DISKGROUP data2 REBALANCE POWER 5 WAIT;The default rebalance power is set by the ASM_POWER_LIMIT
initialization parameter. The range of values for the POWER
clause is the same for theASM_POWER_LIMIT
initialization parameter.
本文标签: OCP
版权声明:本文标题:OCP-1Z0-053-V12.02-74题 内容由热心网友自发贡献,该文观点仅代表作者本人, 转载请联系作者并注明出处:https://www.elefans.com/dongtai/1725431028a1022900.html, 本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容,一经查实,本站将立刻删除。
发表评论