About the database Smart Flash cache feature in Oracle 11GR2 and the operating system that this feature applies To

About the database Smart Flash cache feature in Oracle 11GR2 and the operating system that this feature applies To

Reference from:

How to Size the Database Smart Flash Cache (document ID 1317950.1)

The first is the introduction of the database Smart Flash cache:

The Database Smart Flash Cache is a new feature in Oracle Database 11g Release 2 (11.2). The database Smart Flash cache is a transparent extension of the database buffer caches using solid state device (SSD) Tech Nology. The SSD acts as a level 2 cache to the (Level 1) SGA.  Database Smart Flash Cache can greatly improve the performance of Oracle databases by reducing the amount of disk I/O at a Much lower cost than adding an equivalent amount of RAM.

The operating system that the Database Smart Flash Cache feature applies To:

Your database is running on the Solaris or Oracle Linux operating systems. The flash cache is supported to these operating systems only.

Well, after Rhel has set up flash cache, the DB instance is not coming up, as follows:

Sql> startup;ora-00439:feature not enabled:server Flash Cache

And the DB instance under Oracle Linux will start normally.

About the database Smart Flash cache feature in Oracle 11GR2 and the operating system that this feature applies To