alamb commented on code in PR #6106:
URL: https://github.com/apache/arrow-datafusion/pull/6106#discussion_r1177729222


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datafusion/execution/src/runtime_env.rs:
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@@ -33,6 +33,15 @@ use url::Url;
 
 #[derive(Clone)]
 /// Execution runtime environment.
+///
+/// A [`RuntimeEnv`] can be created from a [`RuntimeConfig`] and
+/// stores state to be shared across multiple sessions. In most

Review Comment:
   This is a good point -- by default a `SessionContext` creates a new instance 
of `RuntimeEnv` -- however that means any limits are not enforced across 
queries. I think this comment was trying to say if you want limits enforced 
across multiple session contexts you need to use the same RuntimeEnv
   
   I have tried to clarify this in  0bbf68718e



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