Improve LoadBalancer#all_caught_up? logic [RUN ALL RSPEC] [RUN AS-IF-FOSS]
What does this MR do?
With the old logic, having a single stale/lagging replica would not allow us to use caught-up replicas, which would increase the load to primary where we could avoid it.
Also adding the comments on the possible improvements of the similar method.
FF rollout issue: #334989 (closed)
Does this MR meet the acceptance criteria?
Conformity
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I have added/updated documentation, or it's not needed. (Is documentation required?) -
I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?) -
I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?) -
I have self-reviewed this MR per code review guidelines. -
This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines) -
I have followed the style guides. -
This change is backwards compatible across updates, or this does not apply.
Availability and Testing
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I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.) -
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I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.
Security
N/A
Related to #326125 (closed)
Edited by Aleksei Lipniagov