Sergei Petrunia 1b076e82db Expose locktree's wait count in RangeLockManagerHandle::Counters (#9289)
Summary:
locktree is a module providing Range Locking. It has a counter for
the number of times a lock acquisition request was blocked by an
existing conflicting lock and had to wait for it to be released.

Expose this counter in RangeLockManagerHandle::Counters::lock_wait_count.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9289

Reviewed By: jay-zhuang

Differential Revision: D33079182

Pulled By: riversand963

fbshipit-source-id: 25b1a362d9da247536ab5007bd15900b319f139e
2021-12-22 21:14:48 -08:00
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