1z0-070 Exam Dumps | You wish to determine if the I/O resource management plan that you created has helped improve the performance

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Question 40/90

You wish to determine if the I/O resource management plan that you created has helped improve the performance of OLTP category I/Os on your X6 Exadata Database Machine.
You decide to examine the relevant metrics on all the cells, to see whether the I/O rate has improved for this category compared to last week, and whether waits and wait time have been reduced.
You issue this command on the first cell:

You examine the output from the first cell which contains:

Which two sets of metrics would you use to determine whether the I/O performance has improved for the OLTP category for the duration of the one-hour measurement period?

A. CT_IO_RQ_SM, CT_IO_RQ_LG, CT_IO_RQ_SM_SEC, and CT_IO_RQ_LG_SEC

B. CT_IO_UTIL_SM and CT_IO_UTIL_LG

C. CT_IO_RQ_SM_SEC and CT_IO_RQ_LG_SEC

D. CT_IO_WT_SM, CT_IO_WT_LG, CT_IO_WT_SM_RQ, and CT_IO_WT_LG_RQ

Correct Answer: D

Explanation/Reference:
CT_IO_RQ_SM

The cumulative number of small I/O requests issued by the category for hard disks. A large value indicates a heavy I/O workload from this category.
CT_IO_RQ_LG

The cumulative number of large I/O requests issued by the category for hard disks. A large value indicates a heavy I/O workload from this category.
CT_IO_WT_SM_RQ

The average IORM wait time per request for small I/O requests issued to hard disks by an IORM category.
CT_IO_WT_LG_RQ

The average IORM wait time per request for large I/O requests issued to hard disks by an IORM category.
Incorrect Answers:
A: CT_IO_RQ_SM_SEC
This metric is derived from CT_IO_RQ_SM. It specifies the rate of small I/O requests issued by the category for hard disks. Its units are number of I/O requests per second. A large value indicates a heavy I/ O workload from this category in the past minute.
B: CT_IO_UTIL_SM
The percentage of disk resources utilized by small requests from this category.
References: http://docs.oracle.com/cd/E80920_01/SAGUG/exadata-storage-server-monitoring.htm

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