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https://issues.apache.org/jira/browse/PHOENIX-4762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16498230#comment-16498230
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Thomas D'Silva commented on PHOENIX-4762:
-----------------------------------------
+1
> Performance regression with transactional immutable indexes
> -----------------------------------------------------------
>
> Key: PHOENIX-4762
> URL: https://issues.apache.org/jira/browse/PHOENIX-4762
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: James Taylor
> Priority: Major
> Fix For: 4.14.0, 5.0.0
>
> Attachments: PHOENIX-4762_v1.patch
>
>
> The introduction of the TAL caused a performance regression with immutable
> indexes. Prior to the TAL, index rows would not be transaction participants
> so they would not take up client memory. Instead, on rollback, we re-generate
> the index deletes.
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