IIRC on branch-2.x, there are some changes on the bucket cache implementation? Off-heap by default? Not sure if this is the problem.
Jan Van Besien <[email protected]> 于2020年6月5日周五 下午9:17写道： > On Fri, Jun 5, 2020 at 2:54 PM 张铎(Duo Zhang) <[email protected]> > wrote: > > So the result is for all data in block cache? What is the block cache > > settings for these two clusters? > > yes. > > Configuration: > - hfile.block.cache.size = 0.4 > - heap size 18.63 GiB (don't ask me why it was not 20 ;-)) > > some relevant statistics from one of the region servers: > - Cache Size Limit 7.5 GB > - Size of Blocks 1.6 GB > > When doing one of the scan tests, the hits increase, the misses stay > stable, and consequently the hit ratio increases as well. So > essentially it is a 100% hit ratio for the scope of the tests. > > Jan - NGDATA >
