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* Merged segments are now warmed-up at the end of the merge operation instead of _refresh, so that _refresh doesn't pay the price for the warm-up of merged segments, which is often higher than flushed segments because of their size. * Even when no _warmer is registered, some basic warm-up of the segments is performed: norms, doc values (_version). This should help a bit people who forget to register warmers. * Eager loading support for the parent id cache and field data: when one can't predict what terms will be present in the index, it is tempting to use a match_all query in a warmer, but in that case, query execution might not be much faster than field data loading so having a warmer that only loads field data without running a query can be useful. Closes #3819 |
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| setup.asciidoc | ||