Guys,
I've already asked this question but nobody answered:
Suppose we have a relatively big index which is continuously updated -
i.e. new docs get added while some of the old docs get deleted.
For pragmatic reasons we have a restriction on maxMergeDocs so that
segment files don't get enormously big.
Consider now a segment of max size (i.e. containing maxMergeDocs docs
hence not eligible for a merge)
It is possible that (as time passes) this segment will have more and
more of its docs deleted.
But as it is not merge-able it will remain the same size and with lots
of "wholes" in it which is bad for performance.
The only way that I am aware of to correct this problem is to invoke
index optimization, which has several drawbacks:
1. it takes a while to optimize a big index.
2. the optimization process always produces a index comprising of a
single (extremely) large segment.
We can live with 1.
But 2 is undesirable.
Is there a way to "optimize" (in terms of purging its deleted docs) an
index or a single segment
without ending up with a single segment index?
Best,
Stanislav
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