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From: Paul Hill <paul@metajure.com>
To: "java-user@lucene.apache.org" <java-user@lucene.apache.org>
Date: Thu, 8 Mar 2012 10:01:32 -0800
Subject: RE: More About NOT Optimizing
Thread-Topic: More About NOT Optimizing
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> I think a good question is whether you are really seeing performance issu=
es due to the 1/3 deleted-
> but-not-yet-reclaimed documents...

No, I'm NOT worried about performance.  I've got the message about optimize=
().  I was just looking for something I might do maybe once or twice a year=
 when the index was off-line or not in heavy use to just get rid of what wa=
sn't needed.  It's sort of like cleaning out the reading material piled all=
 over my house.  I can still live and entertain, but every now and then its=
 seems good to get rid of the excess clutter and fill the recycling bin and=
 make a run to the used book store. =20

Interesting coincidence, just last night one of our in-house indexes must h=
ave decide it could use some merging and dropped 5 segments (of ~30+) and 4=
-5 GB (of a total ~20-25 GB). So it was great to see it in action.=20

I'm in no hurry, but I'll be eventually looking into using TieredMergePolic=
y; maybe as I move to 4.0 (I think it becomes the default then).  Writing m=
y own merge policy seems a bit further off :-)

As usual, thanks for the discussion.

-Paul


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