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From Erick Erickson <>
Subject Re: Changing merge policy config on production
Date Sat, 16 Dec 2017 20:55:34 GMT
So I'm guessing you have something on the order of an 800G index?

The max segment size is roughly 5G (by default) and assuming all your segments
are close to the max size I get 160 * 5G = 800G, but that may be off.

I think you're barking up the wrong tree if these numbers are close to
correct. This is
a _very_ large index. segments per tier and merge at once aren't going
to help you

You could possibly set
to something other than the default 5000, but I seriously doubt your problem is
the number of segments. You need more shards/hardware if my numbers
are in the right ballpark to have a serious impact on performance.


On Sat, Dec 16, 2017 at 12:35 AM, alexpusch <> wrote:
> To be clear - I'm talking about query performance, not indexing performance.
> --
> Sent from:

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