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https://issues.apache.org/jira/browse/CASSANDRA-8937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355114#comment-14355114
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Tyler Hobbs commented on CASSANDRA-8937:
----------------------------------------

There are a lot of metrics that we _could_ aggregate at the keyspace level but 
don't because it's simple enough to aggregate the table-level metrics.  In this 
case, it's just a sum.  I'm not sure if it's worth cluttering the metrics API 
for the convenience of this.

> add liveSSTableCount metrics at keyspace level
> ----------------------------------------------
>
>                 Key: CASSANDRA-8937
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8937
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: yangwei
>            Assignee: yangwei
>            Priority: Minor
>             Fix For: 2.1.4
>
>         Attachments: 0001-add-liveSSTableCount-metrics-at-keyspace-level.patch
>
>
> We currently don't have liveSSTableCount metrics aggregated at keyspace 
> level.  If many sstables exists and we can't realize it earlier,  cassandra 
> will oom while doing scanning operations. It would be nice and easy to 
> aggregate it.



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