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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q48-Q53):
NEW QUESTION # 48
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?
- A. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
- B. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
- C. PMEM Cache section within Exadata Smart Statistics
- D. PMEM Cache section within Memory Statistics
- E. PMEM Pool Misses in the Exadata Outlier Summary
Answer: C,D
Explanation:
The AWR report has two sections that show statistics for X9M Persistent Memory Cache: the PMEM Cache section within Memory Statistics and the PMEM Cache section within Exadata Smart Statistics. Both of these sections provide detailed information about the read and write hits and misses, as well as the total capacity and utilization of the PMEM cache. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 515)
NEW QUESTION # 49
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?
- A. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
- B. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
- C. PMEM Cache section within Exadata Smart Statistics
- D. PMEM Cache section within Memory Statistics
- E. PMEM Pool Misses in the Exadata Outlier Summary
Answer: A,C
Explanation:
Option C shows the number of read hits from PMEM cache on storage servers which indicates how much data was served from PMEM instead of flash or disk1.
Option E shows detailed information about PMEM cache such as size, utilization, hit ratio, read latency and write latency2.
NEW QUESTION # 50
You are adding a disk expansion kit to a running Exadata X8M Database Machine's Database Servers, and have a filesystem layout that includes:
After running the following commands, which command needs to be run to add 20G of space to the filesystem mounted on /u01?
- A. # lvextend -L +20G -verbose /dev/mapper/VGExaDb-LVDbOral
- B. # lvextend -L +20G -verbose /dev/VGExaDb/LVDbOral
- C. # resize2fs +20G /dev/VGExaDb/LVDbOral
- D. # xfs_growfs /uOl +20G
Answer: A
NEW QUESTION # 51
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?
- A. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.
- B. ZFS Snapshots can provide rapid cloning of development and test environment.
- C. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.
- D. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
Answer: C,D
NEW QUESTION # 52
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?
- A. netstat -rn
- B. ifconfig -a legrep "re0| re1"
- C. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
- D. cat /proc/net/bonding/bondeth0
Answer: D
Explanation:
According to Oracle's documentation1, the client network on Exadata X9M-2 Database Server is used for client access to the database servers using Single Client Access Name (SCAN) and Oracle RAC Virtual IP (VIP) addresses. To verify that the client network is available via both client switches, you can use the command:
cat /proc/net/bonding/bondeth0
This command displays information about the bondeth0 interface, which is used for the client network on Exadata X9M-2 Database Server2. You can check if both interfaces (eth0 and eth1) are active and connected to different switches3.
NEW QUESTION # 53
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