[ https://issues.apache.org/jira/browse/FLINK-11037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhijiang closed FLINK-11037. ---------------------------- Resolution: Later I guess we do not have much time to further work on it recently as there are no evidence for problems ATM. I will close it for cleanup until we find it necessary to reopen future. > Introduce another greedy mechanism for distributing floating buffers > -------------------------------------------------------------------- > > Key: FLINK-11037 > URL: https://issues.apache.org/jira/browse/FLINK-11037 > Project: Flink > Issue Type: Sub-task > Components: Runtime / Network > Affects Versions: 1.8.0 > Reporter: Zhijiang > Assignee: Zhijiang > Priority: Minor > > The current mechanism for distributing floating buffers is fair for all the > listeners. In detail, each input channel can only request one floating buffer > each time although this channel may actually need more floating buffers. Then > this channel has to loop to request floating buffer until all are satisfied > or pool is exhausted. > In generally speaking, this way seems fair for all the concurrent channels > invoked by netty nio thread. But every request from LocalBufferPool needs to > syn lock and it is hard to say how to distribute all the available floating > buffers behaves better in real scenarios. > Therefore we propose another greedy mechanism to request more floating > buffers each time. In extreme case, we can even request all the required > buffers at a time or partial ones via configured parameters. On the other > side, LocalBufferPool can also decide how many floating buffers should been > assigned based on some factors, such as how many total channels and how many > total floating buffers. > The motivation is making better use of floating buffer resources and it may > need extra metrics for adjusting the mechanism dynamically. -- This message was sent by Atlassian Jira (v8.3.4#803005)