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 >
