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https://issues.apache.org/jira/browse/SCB-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602109#comment-16602109
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ASF GitHub Bot commented on SCB-885:
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oliugian opened a new pull request #287: SCB-885 saga alpha event scanner
delete duplicate events sql optimization
URL: https://github.com/apache/incubator-servicecomb-saga/pull/287
https://issues.apache.org/jira/browse/SCB-885
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> saga alpha event scanner delete duplicate events sql optimization
> -----------------------------------------------------------------
>
> Key: SCB-885
> URL: https://issues.apache.org/jira/browse/SCB-885
> Project: Apache ServiceComb
> Issue Type: Improvement
> Components: Saga
> Affects Versions: saga-0.2.0
> Reporter: FuChenGeng
> Assignee: FuChenGeng
> Priority: Minor
>
> The count of txevents is about 100m. and this sql spend too much time so that
> the event scanner is blocked.
> [SQL]DELETE FROM TxEvent t WHERE t.type = 'SagaEndedEvent' AND t.surrogateId
> NOT IN ( SELECT MAX(t1.surrogateId) FROM TxEvent t1 WHERE t1.type =
> 'SagaEndedEvent' GROUP BY t1.globalTxId);
>
> 时间: 1308.376s
>
> 受影响的行: 5
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