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If a system's ulimit max_open_files is set to 1024 and there are 10 RocksDB instances running with max_open_files = 256, is it possible that RocksDB will exceed the system's ulimit? Should I configure each RocksDB instance with no more than 1/10th of the system's ulimit?

krithikaGopalakrishnan
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wrkyle
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The system's ulimit is a per process parameter. Assuming you are running 10 RocksDB instances in separate process, each with max_open_files = 256. This will not exceed the system's ulimit. The current setting should just work fine.

krithikaGopalakrishnan
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  • This answer is corroborated here: https://unix.stackexchange.com/questions/75996/modify-ulimit-open-files-of-a-specific-process – wrkyle May 06 '20 at 01:44