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doris/be/test/io/cache
Mingyu Chen 330f369764 [enhancement](file-cache) limit the file cache handle num and init the file cache concurrently (#22919)
1. the real value of BE config `file_cache_max_file_reader_cache_size` will be the 1/3 of process's max open file number.
2. use thread pool to create or init the file cache concurrently.
    To solve the issue that when there are lots of files in file cache dir, the starting time of BE will be very slow because
    it will traverse all file cache dirs sequentially.
2023-08-17 16:52:08 +08:00
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