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POjHiccup: histogram data seems inconsistent
primarykey
Id
16442281
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AcceptedAnswerId
16454747
AnswerCount
1
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CommentCount
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CreationDate
2013-05-08T13:41:03.883
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LastActivityDate
2013-05-14T22:41:39.680
LastEditDate
2013-05-13T10:47:09.073
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text
Body
I'm running an application with Azul's jHiccup. The application is started via jsvc with -javaagent option. jHiccup settings are default (except for output filename). The application runs for ~107 minutes. However, if I add up all the values from the resulting <code>hgrm</code> file, total length of the hiccups seems too large. I calculate the sum of the hiccup values like this: <pre><code>Sum( (TotalCountIncludingThisValue[n] - TotalCountIncludingThisValue[n-1]) * Value[n] ) </code></pre> The result is 12.75 mln., or ~213 minutes (presuming the values are in milliseconds). That is about twice the duration of the application run. <code>Total count * Mean</code> (from the bottom of the histogram values) also give 12 mln., so the formula is likely to be correct. For comparison, I added up "Application time" and "Stopped time" from GC log. The results are close to what I expect: ~105 min. app time and ~2 min. stopped time. <hr> I've accidentally overwritten the original files, so these are the example files from a different run: <a href="https://dl.dropboxusercontent.com/u/644287/jHiccup/hiccup.dat" rel="nofollow">https://dl.dropboxusercontent.com/u/644287/jHiccup/hiccup.dat</a> <a href="https://dl.dropboxusercontent.com/u/644287/jHiccup/hiccup.dat.hgrm" rel="nofollow">https://dl.dropboxusercontent.com/u/644287/jHiccup/hiccup.dat.hgrm</a> The run took ~79 minutes (17:50-19:09), however Mean*TotalCount is ~23 mln. (that is, 380 minutes).
Tags
<java><performance>
Title
jHiccup: histogram data seems inconsistent
singulars
PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USVladV
UserOwnerUserId
1. USVladV
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1. This table or related slice is empty.
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1. This table or related slice is empty.
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1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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1. This table or related slice is empty.
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