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Question 140/150
You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your database server that is running on Oracle Linux.
You have set the parameter:
DB_FLASH_CACHE_FILE= '/dev/flash_device_1' ,'/dev/flash_device_2'
How should the DB_FLASH_CACHE_SIZEbe configured to use both devices?
You have set the parameter:
DB_FLASH_CACHE_FILE= '/dev/flash_device_1' ,'/dev/flash_device_2'
How should the DB_FLASH_CACHE_SIZEbe configured to use both devices?
Correct Answer: B
Explanation/Reference:
Explanation:
* Smart Flash Cache concept is not new in Oracle 12C - DB Smart Flash Cache in Oracle 11g.
In this release Oracle has made changes related to both initialization parameters used by DB Smart Flash cache. Now you can define many files|devices and its sizes for "Database Smart Flash Cache" area. In previous releases only one file|device could be defined.
DB_FLASH_CACHE_FILE = /dev/sda, /dev/sdb, /dev/sdc
DB_FLASH_CACHE_SIZE = 32G, 32G, 64G
So above settings defines 3 devices which will be in use by "DB Smart Flash Cache"
/dev/sda - size 32G
/dev/sdb - size 32G
/dev/sdc - size 64G
New view V$FLASHFILESTAT - it's used to determine the cumulative latency and read counts of each file| device and compute the average latency
Explanation:
* Smart Flash Cache concept is not new in Oracle 12C - DB Smart Flash Cache in Oracle 11g.
In this release Oracle has made changes related to both initialization parameters used by DB Smart Flash cache. Now you can define many files|devices and its sizes for "Database Smart Flash Cache" area. In previous releases only one file|device could be defined.
DB_FLASH_CACHE_FILE = /dev/sda, /dev/sdb, /dev/sdc
DB_FLASH_CACHE_SIZE = 32G, 32G, 64G
So above settings defines 3 devices which will be in use by "DB Smart Flash Cache"
/dev/sda - size 32G
/dev/sdb - size 32G
/dev/sdc - size 64G
New view V$FLASHFILESTAT - it's used to determine the cumulative latency and read counts of each file| device and compute the average latency
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