[GitHub] [pulsar] grantwwu commented on a change in pull request #4780: Clarify how retention interacts with readers

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grantwwu commented on a change in pull request #4780: Clarify how retention interacts with readers
URL: https://github.com/apache/pulsar/pull/4780#discussion_r312276536
 
 

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 File path: site2/docs/cookbooks-retention-expiry.md
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 @@ -122,6 +128,8 @@ admin.namespaces().getRetention(namespace);
 
 You can control the allowable size of backlogs, at the namespace level, using *backlog quotas*. Setting a backlog quota involves setting:
 
+TODO: Expand on is this per backlog or per topic?
 
 Review comment:
   Er, so to clarify:
   
   Suppose I have 10 subscriptions on a topic.  They have not acknowledged the last 1000 messages, which are 1 kilobyte each.
   
   Is the value that is being compared to the quota 1 megabyte or 10 megabytes?

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