That's right, you do not need to run optimize.
Over time the disk space will gradually be reclaimed through Lucene's
normal merging...
Mike
dan at gmail wrote:
Also, over time, as segments that have marked deletions are merged,
the disk space is also reclaimed.
Thanks Mike.
So can I say that calling optimzie() is really optional? Because I
was
worrying that these deleted documents would never get cleaned if I
don't run
optimize() and eventually it would run out of the disk space. What
I am
trying to figure out here is if optimization is mandatory. I know
that
optimization would improve the search performance, however it would
take a
long time to run and the application I am writing needs to update
the index
very frequently. According to "Lucene in Action", running
optimization is
not recommended in my case. So would you please advise?
Thanks,
Dan
Michael McCandless-2 wrote:
Either optimize() or expungeDeletes() will reclaim the disk space
used
by deleted documents.
Also, over time, as segments that have marked deletions are merged,
the disk space is also reclaimed.
Mike
dan at gmail wrote:
Hello,
Could someone please confirm that calling indexWriter.optimize() is
the only
way to clean out the deleted documents from the disk?
I understand that indexWriter.deleteDocuments() does not clean the
disk
space, and I tested that calling after indexWriter.flush() and
indexWriter.close() after indexWriter.deleteDocuments() does not
clean the
disk space either. So do they only mark the documents have been
deleted,
then which method really do the "delete" the documents (from the
disk)?
Thanks,
Dan
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