3.4.6 Disabling Write Back Flash Cache

You can disable the Write-Back Flash Cache by enabling Write-Through Flash Cache.

Starting with Oracle Exadata System Software release 11.2.3.2.1, Exadata Smart Flash Cache can transparently cache frequently-accessed data to fast solid-state storage, improving query response times and throughput.

Write operations serviced by flash instead of by disk are referred to as write back flash cache.

• Disable Write-Back Flash Cache Along With Write-Back PMEM Cache
  
• Disable Write Back Flash Cache for 11.2.3.3.1 or Higher
  You can disable write back Flash Cache on the storage servers by changing the mode to Write Through.
• Disabling Write Back Flash Cache on a Rolling Basis for Software Versions Lower Than 11.2.3.3.1
  You can enable Write Back Flash Cache on each storage server using a rolling method.
• Disabling Write Back Flash Cache on a Non-Rolling Basis for Software Versions Lower Than 11.2.3.3.1
  You can enable Write Back Flash Cache on a non-rolling basis.