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https://issues.apache.org/jira/browse/PHOENIX-1240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14220562#comment-14220562
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James Taylor commented on PHOENIX-1240:
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Not necessarily, but usually the first column family is the default column
family. This can be overridden by the DEFAULT_COLUMN_FAMILY property. The
default column family is the column family that will contain a key value column
that does not specify a column family. The empty column family is the column
family that contains the empty key value. It will be the first column family
that is created for a table. They don't have to be the same.
> Add TTL to SYSTEM.TRACING_STATS table
> -------------------------------------
>
> Key: PHOENIX-1240
> URL: https://issues.apache.org/jira/browse/PHOENIX-1240
> Project: Phoenix
> Issue Type: Sub-task
> Affects Versions: 5.0.0, 4.1.1
> Reporter: Jesse Yates
> Assignee: Alicia Ying Shu
> Fix For: 5.0.0, 4.1.1
>
> Attachments: PHOENIX-1240.patch
>
>
> Tracing table should have a configurable TTL on it, so the table doesn't fill
> up with too much data.
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