[linux-lvm] lvmcache performance

[Mateusz Korniak]

On Monday 08 February 2016 14:05:24 Nikolaus Rath wrote:
> Well, yes, but since in my case the cache is bigger than the origin,
> shouldn't eventually *everything* end-up in the cache?

IIRC you lowered *_promote_adjustment, but still full copy may be prevented by 
sequential_threshold setting.

And how many blocks you have in cache after boot? [1]
Is number rising every boot?
Can you verify cache settings? [2]

[1]:
lvs -o+cache_total_blocks,cache_used_blocks,cache_dirty_blocks,
cache_read_hits,cache_read_misses,cache_write_hits,cache_write_misses,lv_health_status


[2]:
dmsetup status   VG-LV
lvs -o+cache_policy,cache_settings,chunksize VG/LV


-- 
Mateusz Korniak
"(...) mam brata - poważny, domator, liczykrupa, hipokryta, pobożniś,
 	krótko mówiąc - podpora społeczeństwa."
				Nikos Kazantzakis - "Grek Zorba"