Il mer 2 ago 2017, 18:51 Sijie Guo <guosi...@gmail.com> ha scritto: > On Wed, Aug 2, 2017 at 8:21 AM, Enrico Olivelli <eolive...@gmail.com> > wrote: > > > Hi, > > I am trying to understand because after running my benchmark (see [1]) > the > > overall performances slow down incredibly. The bench starts at 80,8 MB/s > > throughput and drops to 10,2 MB/s throughput. > > > > I think that the problem could be the I am creating a lot of ledgers on a > > single bookie. > > It seems that the more active ledgers I have the more time it takes the > > bookie to process internal activities, like > > IndexInMemPageMgr#flushOneOrMoreLedgers(true). > > > What is your disk layout? journal/ledger/index directory settings? >
All in one disk, on a tmp dir under target. Hdd vs ssd is the same > > What is your ledger storage? are you using sorted or not? > Sorted Can you run the test? Just clone and run Mvn test -Dtest= BookKeeperWriteSynchClientsTest I am curious to know if the fact happens on other laptops Enrico > > > > > > The slow down starts after the first line in logs as: > > org.apache.bookkeeper.bookie.EntryLogger flushRotatedLogs > > > > I suspect that there is a piece of the story that I am missing. > > > > This behavior is the same on BK 4.4 and BK 4.5 > > > > Is it possible ? > > > > [1] > > > https://github.com/eolivelli/bookkeepers-benchs/blob/master/src/test/java/ > > BookKeeperWriteSynchClientsTest.java > > > > Thanks > > > > -- Enrico > > > -- -- Enrico Olivelli
