Excuse me, could you tell me the default resource size? When I see the document, those are None but if I did not set any for them, then what size is allocated for each task? https://docs.flyte.org/projects/flytekit/en/latest/generated/flytekit.Resources.html

Default resource should be configured in flytepropeller deployment i think

yeah, there's a task-resources configuration option in flyteadmin that sets these defaults. this covers the very basic use-cases but you can use matchable resources to setup project / domain specific or even workflow-level specific resource requests as well.