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From Michael McCandless <>
Subject Re: External sort
Date Thu, 17 Dec 2009 09:58:09 GMT
There was a recent thread on neat algos that can compute the global
order in multiple passes to keep RAM usage low.


On Thu, Dec 17, 2009 at 1:48 AM, Ganesh <> wrote:
> Hello all,
> We are facing serious issues related to Sorting in production environment. I know this
issues has been discussed in this group. I am using v2.9.1 I am having multiple shards and
i need to do only date time sorting. Sorting consumes 50% of RAM.
> Is anyone has attempted to use external sorting?
> Is there any way to index the records in sorted order. Sort and Merge the records at
indexing time and pull the records sorted by doc id?
> Any other ideas.... I need to do sort with less memory. Performance is not the concern.
> Regards
> Ganesh
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