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From Michael McCandless <luc...@mikemccandless.com>
Subject Re: Optimization and Corruption Issues
Date Thu, 01 Oct 2009 17:01:27 GMT
On Thu, Oct 1, 2009 at 12:49 PM, Earwin Burrfoot <earwin@gmail.com> wrote:

> If you're doing a full optimize, you're still using a single thread. Am I wrong?

Depends on how many merges are required, and, the merge scheduler.  In
this case (w/ 7000 segments, which is way too many, normally!),
assuming ConcurrentMergeScheduler, multiple threads will be used since
many merges will be pending.

When it gets down to the last (enormous) merge, it's only one thread.

Mike

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