saintstack commented on pull request #3371: URL: https://github.com/apache/hbase/pull/3371#issuecomment-858768175
> Cache is keyed by the Thread object using the future. You might check if guava cache is backed by a ConcurrentHashMap (going by API, it looks like it). CHM #get and #put are lockless but the likes of #putIfAbsent are not; they lock the 'bucket' the key is in. We have a PerformanceEvaluation for WAL that might help here... Could try a run and see if you see the cache mentioned in a profile, etc. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
