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From Dawid Weiss <dawid.we...@gmail.com>
Subject Re: Lucene indexing throughput (and Mike's lucenebench charts)
Date Thu, 14 Apr 2016 18:03:56 GMT
The GC change is after this:

BJ (2015-12-02): Upgrade to beast2 (72 cores, 256 GB RAM)

which leads me to believe these results are not comparable (different
machines, architectures, disks, CPUs perhaps?).

Dawid


On Thu, Apr 14, 2016 at 7:13 PM, Otis Gospodnetić
<otis.gospodnetic@gmail.com> wrote:
> Hi,
>
> I was looking at Mike's
> http://home.apache.org/~mikemccand/lucenebench/indexing.html secretly
> hoping to spot some recent improvements in indexing throughput.... but
> instead it looks like:
>
> * indexing throughput hasn't really gone up in the last ~5 years
> * indexing was faster in 2014, but then dropped to pre-2014 speed in early
> 2015
> * indexing rate dropped some more in early 2016, and that seems to roughly
> correlate to a *big* jump in Young GC in late 2015
>
> Does anyone know what happened in late 2015 that causes that big Young GC
> jump?
> Or does that big jump just look scary in that chart, but is not actually a
> big concern in practice?
>
> Thanks,
> Otis
> --
> Monitoring - Log Management - Alerting - Anomaly Detection
> Solr & Elasticsearch Consulting Support Training - http://sematext.com/

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