Are you sure you need a 100GB heap? The stall could be a major GC.

We run with an 8GB heap. We also run with Xmx equal to Xms, growing memory to 
the max was really time-consuming after startup.

What version of Java? What GC options?

wunder
Walter Underwood
wun...@wunderwood.org
http://observer.wunderwood.org/  (my blog)


> On Jul 25, 2017, at 12:03 PM, David Hastings <hastings.recurs...@gmail.com> 
> wrote:
> 
> I am trying to optimize a rather large index (417gb) because its sitting at
> 28% deletions.  However when optimizing, it stops at exactly 492.24 GB
> every time.  When I restart solr it will fall back down to 417 gb, and
> again, if i send an optimize command, the exact same 492.24 GB and it stops
> optimizing.  There is plenty of space on the drive, and im running it
> at -Xmx100000m -Xms7000m on a machine with 132gb of ram and 24 cores.  I
> have never ran into this problem before but also never had the index get
> this large.  Any ideas?
> (solr 5.2 btw)
> thanks,
> -Dave

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