On Wed, 2015-05-06 at 00:58 -0700, adfel70 wrote: > each shard has around 200 million docs. size of each shard is 250GB. > this runs on 12 machines. each machine has 4 SSD disks and 4 solr processes. > each process has 28GB heap. each machine has 196GB RAM.
[...] > 1. heavy GCs when soft commit is performed (methods 1,2) or when hardcommit > opensearcher=true is performed. these GCs cause heavy latency (average > latency is 3 secs. latency during the problem is 80secs) Sanity check: Are you sure the pauses are due to garbage collection? You have a fairly large heap and judging from your previous post "problem with facets - out of memory exception", you are doing non-trivial faceting. Are you using DocValues, as Marc suggested? - Toke Eskildsen, State and University Library, Denmark
