gianm commented on issue #6988: [Improvement] historical fast restart by lazy load columns metadata(20X faster) URL: https://github.com/apache/incubator-druid/pull/6988#issuecomment-460872112 IMO a lazy loading option is nice for very dense historical nodes. So I am supportive of this idea. It should be off by default, though, since it defers work from startup to query time, and for a medium/low-density historical node you'd prefer to do that work at startup to keep queries fast.
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