"copy to {table} stdout" has never ending

Issue Summary

On Postgre DB, (The below image) copy to {table} stdout command is run regularly.

This sql has never ending and keep active sql, and it’s also takes ram continuously until No available memory.

Now, I kill the sql with pg_terminate_backend. but, It’s only a temporary solution.
I want to know why is this run command regularly.
Is it just backup or dump? And, Do anyone know how to solve this problem?
When did I terminate this sql, has it side effect?

Technical details:

  • Redash Version: 8.0.0.b32245
  • Browser/OS: Chrome / Mac
  • How did you install Redash: docker-compose