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https://issues.apache.org/jira/browse/STRATOS-625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nirmal Fernando resolved STRATOS-625.
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Resolution: Fixed
> Error in scale down logic
> --------------------------
>
> Key: STRATOS-625
> URL: https://issues.apache.org/jira/browse/STRATOS-625
> Project: Stratos
> Issue Type: Bug
> Components: Autoscaler
> Affects Versions: 4.0.0 Alpha
> Reporter: Nirmal Fernando
> Assignee: Nirmal Fernando
> Priority: Blocker
> Fix For: 4.0.0 RC1
>
>
> Seems like following current scale down rule is not accurate.
> scaleDown : Boolean() from ((rifReset && (rifPredictedValue < rifAverageLimit
> * 0.1)) || (mcReset && (mcPredictedValue < mcAverageLimit * 0.1)) || (laReset
> && (laPredictedValue < laAverageLimit * 0.1)))
> Note the 'OR' conditions. If you read this, it'll mean that system would
> scale down if any of the factors resulted to drop down than its threshold,
> despite higher requests in one of the factors.
> IMO we should use 'AND's instead of 'OR's.
> Proposed fix:
> scaleDown : Boolean() from ((rifReset && (rifPredictedValue < rifAverageLimit
> * 0.1)) && (mcReset && (mcPredictedValue < mcAverageLimit * 0.1)) && (laReset
> && (laPredictedValue < laAverageLimit * 0.1)))
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