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https://issues.apache.org/jira/browse/IOTDB-840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17195849#comment-17195849
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Jialin Qiao commented on IOTDB-840:
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Good work! Each enum reference takes 4 bytes, so three enums occupy 12 bytes.
Using 3 bytes saves 9 bytes per series. 1M * 9 = 9M, the result is reasonable.
You could use Jprofiler to analyze the memory.
> Encode the three enum fields in MeasurementSchema to save memory
> ----------------------------------------------------------------
>
> Key: IOTDB-840
> URL: https://issues.apache.org/jira/browse/IOTDB-840
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/Engine
> Reporter: Jialin Qiao
> Assignee: wangyanhong
> Priority: Major
> Labels: easy-fix, pull-request-available
> Attachments: 1.png, 2.png, 3.png, 4.png, 5.png, 6.png
>
>
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