On 17 November 2015 at 12:13, Akmal Abbasov <[email protected]> wrote:
> Hi Raul, > Thank you for your response. > I am running zookeeper with -Xms512m -Xmx1g options, is this enough. > It depends on your workload.. how many writes/read per sec are you expecting/seeing? Are you seeing long GC pauses? If so, you'll need more mem or bigger tick times, otherwise you'll miss the deadlines for the pings (both among learners and to clients...). > Regarding the network, all of the server zk server nodes are hosted in the > cloud, in the same dc. > But according to the zk troubleshooting guide, the timeout should be > increased for cloud environments. > Yup, latency can be unpredictable in the cloud... > One more thing is that, I’m seeing a lot of > fsync-ing the write ahead log in SyncThread:1 took 2962ms which will > adversely effect operation latency. See the ZooKeeper troubleshooting guide > messages in the logs. > That definitely looks bad and will block everything else. What type of disc are you writing your logs and snapshots to? Are they separate volumes? -rgs
