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From Toke Eskildsen ...@statsbiblioteket.dk>
Subject Re: severe problems with soft and hard commits in a large index
Date Wed, 06 May 2015 08:45:37 GMT
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



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