Der Check für die Flash-Cache Performance (FlashCache) bekommt drei zusätzliche Counter im nächsten release (3.3.0):

  • disk_reads_replaced: Estimated number of disk reads per second replaced by cache
  • evicts: Number of blocks evicted from the external cache
    to make room for new blocks
  • evicts_ref: Number of blocks evicted from the external cache
    that were used once or more.
The evict counter shows blocks flushed out of the cache, which is interesting as you can determine if your flashcache is too small on the number of evicts and inserts.