We just completed this past Monday an ES upgrade from 1.1.1 to 1.4.2 and a
Java upgrade from 7 to 8. No other changes. Same boxes, same specs, no new
queries or filters, no increased requests. What I see in Marvel since the
upgrade is a large spike in Disk IO:
1.4.2 comes with a couple optimization which might explain the drop in
field data cache and lucene memory (most notably here is the disabling of
bloom filters by default - due to improvements in lucene they are not as
needed as before and we can save on the memory).
The IO spike might come
from https://github.com/elasticsearch/elasticsearch/pull/9683 , which is
still under heavy discussion. Can you try running _hot_threads on you
cluster and see whether you there's anything stats releated there?
On Wednesday, February 11, 2015 at 5:57:11 PM UTC+1, George Stathis wrote:
Hi there,
We just completed this past Monday an ES upgrade from 1.1.1 to 1.4.2 and a
Java upgrade from 7 to 8. No other changes. Same boxes, same specs, no new
queries or filters, no increased requests. What I see in Marvel since the
upgrade is a large spike in Disk IO:
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