[FLINK-16012] Reduce the default number of exclusive buffers from 2 to 1 on receiver side

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Fix Version/s: 1.14.0
• Component/s: Runtime / Network
• Labels: pull-request-available
• Assignee: Yingjie Cao
• Reporter: Zhijiang
• Created: 12/Feb/20 05:51
• Updated: 23/Sep/21 18:02
• Resolved: 13/Jul/21 07:58

Description

In order to reduce the inflight buffers for checkpoint in the case of back pressure, we can reduce the number of exclusive buffers for remote input channel from default 2 to 1 as the first step. Besides that, the total required buffers are also reduced as a result. We can further verify the performance effect via various of benchmarks.

Issue Links

• supercedes: FLINK-9142 Lower the minimum number of buffers for incoming channels to 1
• links to: GitHub Pull Request #11088