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由 Siying Dong 提交于
Summary: Choose to preload some files if options.max_open_files != -1. This can slightly narrow the gap of performance between options.max_open_files is -1 and a large number. To avoid a significant regression to DB reopen speed if options.max_open_files != -1. Limit the files to preload in DB open time to 16. Pull Request resolved: https://github.com/facebook/rocksdb/pull/3340 Differential Revision: D6686945 Pulled By: siying fbshipit-source-id: 8ec11bbdb46e3d0cdee7b6ad5897a09c5a07869f
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