Zhongyi Xie 945f618ba5 log flush reason for better debugging experience ... Summary: It's always a mystery from the logs why flush was triggered -- user triggered it manually, WriteBufferManager triggered it, logs were full, write buffer was full, etc. This PR logs Flush reason whenever a flush is scheduled. Closes https://github.com/facebook/rocksdb/pull/3401 Differential Revision: D6788142 Pulled By: miasantreble fbshipit-source-id: a867e54d493c06adf5172bd36a180fb3faae3511		2018-02-09 12:12:43 -08:00
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rocksdb	log flush reason for better debugging experience	2018-02-09 12:12:43 -08:00