Hi Enrico, Thanks for the reply.
1. We are using direct NIO based stack, not Netty based yet. 2. Yes, on the client side, here are the metrics 3.6: On Mon, Feb 15, 2021 at 10:44 AM Enrico Olivelli <eolive...@gmail.com> wrote: > IIRC The main difference is about the switch to Netty 4 and about using > more DirectMemory. Are you using the Netty based stack? > > Apart from that macro difference there have been many many changes since > 3.4. > > Do you have some metrics to share? > Are the JVM configurations and zoo.cfg configuration equals to each other? > > Do you see warnings on the server logs? > > Did you upgrade both the client and the server or only the server? > > Enrico > > > Il Lun 15 Feb 2021, 18:30 Li Wang <li4w...@gmail.com> ha scritto: > > > Hi, > > > > We want to upgrade from 3.4.14 to 3.6.2. During the perform/load > > comparison test, it was found that the performance of 3.6 has been > > significantly degraded compared to 3.4 for the write operation. Under the > > same load, there was a huge number of SessionExpired and ConnectionLoss > > errors in 3.6 while no such errors in 3.4. > > > > The load testing is 500 concurrent users with a cluster of 5 participants > > and 5 observers. The min session timeout on the server side is 4000ms. > > > > I wonder if anyone has seen the same issue and has any insights on what > > could be the cause of the performance degradation. > > > > Thanks > > > > Li > > >
