I have noticed the same. I think in the "real" world your compaction throughput is limited by other things. If I had to speculate I would say that compaction can remove expired tombstones, however doing this requires bloom filter checks, etc.
I think that setting is more important with multi threaded compaction and/or more compaction slots. In those cases it may actually throttle something. On Wed, Apr 24, 2013 at 3:54 PM, Hiller, Dean <dean.hil...@nrel.gov> wrote: > I was wondering about the compactionthroughput. I never see ours get even > close to 16MB and I thought this is supposed to throttle compaction, right? > Ours is constantly less than 3MB/sec from looking at our logs or do I have > this totally wrong? How can I see the real throughput so that I can > understand how to throttle it when I need to? > > 94,940,780 bytes to 95,346,024 (~100% of original) in 38,438ms = > 2.365603MB/s. 2,350,114 total rows, 2,350,022 unique. Row merge counts > were {1:2349930, 2:92, } > > Thanks, > Dean > > > >