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Oracle Exam 1Z0-084 Topic 16 Question 21 Discussion

Actual exam question for Oracle's 1Z0-084 exam
Question #: 21
Topic #: 16
[All 1Z0-084 Questions]

You must configure and enable Database Smart Flash Cache for a database.

You configure these flash devices:

Examine these parameter settings:

What must be configured so that the database uses these devices for the Database Smart Flash Cache?

Show Suggested Answer Hide Answer
Suggested Answer: E

To configure and enable Database Smart Flash Cache, you must set the DB_FLASH_CACHE_SIZE parameter to reflect the combined size of the flash devices you intend to use for the cache. In this scenario, two flash devices are configured: /dev/sdj with 128G and /dev/sdk with 64G.

Determine the combined size of the flash devices intended for the Database Smart Flash Cache. In this case, it's 128G + 64G = 192G.

However, Oracle documentation suggests setting DB_FLASH_CACHE_SIZE to the exact sizes of the individual devices, separated by a comma when multiple devices are used.

Modify the parameter in the database initialization file (init.ora or spfile.ora) or using an ALTER SYSTEM command. Here's the command for altering the system setting:

ALTER SYSTEM SET DB_FLASH_CACHE_SIZE='128G,64G' SCOPE=SPFILE;

Since this is a static parameter, a database restart is required for the changes to take effect.

Upon database startup, it will allocate the Database Smart Flash Cache using the provided sizes for the specified devices.

It is important to note that MEMORY_TARGET and MEMORY_MAX_TARGET parameters should be configured independently of DB_FLASH_CACHE_SIZE. They control the Oracle memory management for the SGA and PGA, and do not directly correlate with the flash cache configuration.

Reference

Oracle Database 19c Documentation on Database Smart Flash Cache

Oracle Support Articles and Community Discussions on DB_FLASH_CACHE_SIZE Configuration


Contribute your Thoughts:

Tresa
2 months ago
Hold on, are we sure these flash devices are compatible with the database? I mean, who knows what kind of magic is happening in there. Better double-check the documentation!
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Malcom
1 months ago
User 2: Yeah, good idea. We don't want any surprises when configuring the Database Smart Flash Cache.
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Charolette
1 months ago
User 3: I'll make sure to verify before making any changes to the settings.
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Ashlyn
2 months ago
User 1: Let's check the documentation to make sure these flash devices are compatible.
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Cammy
3 months ago
Hmm, I'm not sure about this one. But I think option E is the way to go, setting DB_FLASH_CACHE_SIZE to 128G and 64G. Can't be too much flash cache, right?
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Wei
1 months ago
User4: Option E does seem like a good fit for utilizing the flash devices effectively.
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Emile
1 months ago
User3: Yeah, that makes sense. It's important to find the right balance for optimal performance.
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Wilburn
2 months ago
I agree, it seems like the most reasonable option for configuring the Database Smart Flash Cache.
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Sue
2 months ago
I think option E is the best choice, setting DB_FLASH_CACHE_SIZE to 128G and 64G.
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Thaddeus
3 months ago
But setting MEMORY_TARGET to 256G will help utilize the flash devices efficiently, so A) seems more appropriate.
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Allene
3 months ago
I think option D is the way to go. We need to set the DB_FLASH_CACHE_SIZE to 256G and change the device /dev/sdk to 128G.
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Deeanna
2 months ago
I think option D is more specific to utilizing the flash devices efficiently.
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Leonard
2 months ago
But what about option A? Setting DB_FLASH_CACHE_SIZE to 192G and MEMORY_TARGET to 256G could work too.
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Sheron
2 months ago
I agree, option D seems like the correct choice.
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Celestina
3 months ago
I disagree, I believe the correct answer is B) Set DB_FLASH_CACHE_SIZE parameter to 192G.
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Layla
3 months ago
The correct answer is B. We just need to set the DB_FLASH_CACHE_SIZE parameter to 192G to enable the Database Smart Flash Cache.
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Lizbeth
3 months ago
B) The correct answer is B. We just need to set the DB_FLASH_CACHE_SIZE parameter to 192G to enable the Database Smart Flash Cache.
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Barrett
3 months ago
A) Set DB_FLASH_CACHE_SIZE parameter to 192G.
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Thaddeus
3 months ago
I think the answer is A) Set DB_FLASH_CACHE_SIZE to 192G and MEMORY_TARGET to 256G.
upvoted 0 times
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