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https://issues.apache.org/jira/browse/HBASE-24659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17173175#comment-17173175
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Hudson commented on HBASE-24659:
--------------------------------
Results for branch master
[build #1806 on
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/master/1806/]: (x)
*{color:red}-1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://builds.apache.org/job/HBase%20Nightly/job/master/1806/General_20Nightly_20Build_20Report/]
(x) {color:red}-1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://builds.apache.org/job/HBase%20Nightly/job/master/1806/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(x) {color:red}-1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://builds.apache.org/job/HBase%20Nightly/job/master/1806/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(x) {color:red}-1 client integration test{color}
--Failed when running client tests on top of Hadoop 2. [see log for
details|https://builds.apache.org/job/HBase%20Nightly/job/master/1806//artifact/output-integration/hadoop-2.log].
(note that this means we didn't run on Hadoop 3)
> Calculate FIXED_OVERHEAD automatically
> --------------------------------------
>
> Key: HBASE-24659
> URL: https://issues.apache.org/jira/browse/HBASE-24659
> Project: HBase
> Issue Type: Improvement
> Reporter: Duo Zhang
> Assignee: niuyulin
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.4.0
>
> Attachments: 50M-performance.pdf
>
>
> Now the FIXED_OVERHEAD in some classes are maintained manually, an we have a
> method to TestHeapSizes to confirm that the value is correct.
> But it is really hard for developers to count the fields in a complicated
> class like HRegion. Since we have the ability to calcuate the accurate size
> in UT, I think we it is also possible to calcuate it when loading the class,
> which is a one time operation so should not effect the performance too much.
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