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https://issues.apache.org/jira/browse/FLINK-28751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-28751.
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Fix Version/s: 1.16.0
(was: 1.17.0)
Resolution: Fixed
Fixed in master: 2220f24925ab5146d5771c3782ed8c0837bb0bc4
> Poor performance of the built in json_value function
> ----------------------------------------------------
>
> Key: FLINK-28751
> URL: https://issues.apache.org/jira/browse/FLINK-28751
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Runtime
> Reporter: Aitozi
> Assignee: Aitozi
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
> Attachments: image-2022-07-30-15-47-34-788.png
>
>
> When I use the JSON_VALUE function, I found the performance is very poor.
> It's mainly affected by the heavy lock operation in jsonpath inner LRUCache
> which is also observed by other systems, eg:
> [https://github.com/apache/pinot/pull/7409|https://github.com/apache/pinot/pull/7409]
> !image-2022-07-30-15-47-34-788.png|width=500,height=250!
> So I proposal to use a different cache to replace the current one for better
> performance.
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