pd-server v4.0.6

Improvements

• Update TiDB Dashboard to v2020.09.08.1 #2928
• Add more metrics for Region and store heartbeat #2891
• Change back to the original way to control the low space threshold #2875
• Support standard error codes #2918 #2911 #2913 #2915 #2912 #2907 #2906 #2903 #2806 #2900 #2902

Bug Fixes

• Add the initial-cluster-token configuration to prevent different clusters from communicating with each other during bootstrap #2922
• Fix the unit of store limit rate when the mode is auto #2826
• Fix the issue that some schedulers persist configuration without solving errors #2818
• Fix the empty HTTP response in scheduler #2871 #2874

TiDB Dashboard

• Add Query Editor and execution UI (experimental) #713
• Support store location topology visualization #719
• Add cluster configuration UI (experimental) #733
• Support sharing the current session #741
• Support displaying the number of execution plans in SQL Statement list #746