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https://issues.apache.org/jira/browse/IOTDB-5319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17653053#comment-17653053
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Jinrui Zhang commented on IOTDB-5319:
-------------------------------------
We have found the commit which leader to the decline.
The commit change the limitation style of compaction task from I/O size to
iops, which leads to that the compcation grabs more resources from read/write.
[~marklau99] Please investigate the issue
> The write speed in atoms testing declined after merging commit 5126711d
> -----------------------------------------------------------------------
>
> Key: IOTDB-5319
> URL: https://issues.apache.org/jira/browse/IOTDB-5319
> Project: Apache IoTDB
> Issue Type: Improvement
> Reporter: Jinrui Zhang
> Assignee: Jinrui Zhang
> Priority: Major
> Attachments: image-2022-12-29-18-37-25-693.png,
> image-2022-12-29-18-38-45-394.png
>
>
> !image-2022-12-29-18-37-25-693.png|width=701,height=156!
>
> After merging this commit, the write speed in atoms testing declined.
>
> We inferred that this change lead to compaction grabs more CPU/IO resources,
> which decrease available resources of write/read.
>
> After we change the parameter `iops_per_min` from 50 to 30, the scenario
> still exists.
> See this snapshot,
> !image-2022-12-29-18-38-45-394.png|width=541,height=346!
>
> Let's investigate the details.
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