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From wojtekpia <>
Subject Re: Snapinstaller vs Solr Restart
Date Tue, 06 Jan 2009 22:18:26 GMT

I'm optimizing because I thought I should. I'll be updating my index
somewhere between every 15 minutes, and every 2 hours. That means between 12
and 96 updates per day. That seems like a lot of index files (and it scared
me a little), so that's my second reason for wanting to optimize nightly.

I haven't benchmarked the performance hit for not optimizing. That'll be my
next step. If the hit isn't too bad, I'll look into optimizing less
frequently (weekly, ...).

Thanks Otis!

Otis Gospodnetic wrote:
> OK, so that question/answer seems to have hit the nail on the head.  :)
> When you optimize your index, all index files get rewritten.  This means
> that everything that the OS cached up to that point goes out the window
> and the OS has to slowly re-cache the hot parts of the index.  If you
> don't optimize, this won't happen.  Do you really need to optimize?  Or
> maybe a more direct question: why are you optimizing?
> Regarding autowarming, with such high fq hit rate, I'd make good use of fq
> autowarming.  The result cache rate is lower, but still decent.  I
> wouldn't turn off autowarming the way you have.

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