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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9900) Fix high CPU deviation seen in Zone/Cluster metrics view
Date Tue, 16 May 2017 07:16:04 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16011873#comment-16011873
] 

ASF subversion and git services commented on CLOUDSTACK-9900:
-------------------------------------------------------------

Commit efe76469776feae0e2a9d9e9edbce8d62206b3cf in cloudstack's branch refs/heads/master from
[~rohit.yadav@shapeblue.com]
[ https://gitbox.apache.org/repos/asf?p=cloudstack.git;h=efe7646 ]

CLOUDSTACK-9900: Fix high CPU deviation issues seen in metrics view

HostStats returns cpu usage in percentage while memory usage in bytes.
This fixes a regression in maximum CPU usage deviation that did not
assume the values to be in percentage and multiple the final ratios
with 100 which leads to 100x the actual deviation value.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>


> Fix high CPU deviation seen in Zone/Cluster metrics view
> --------------------------------------------------------
>
>                 Key: CLOUDSTACK-9900
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9900
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rohit Yadav
>            Assignee: Rohit Yadav
>             Fix For: Future, 4.10.0.0, 4.9.3.0
>
>
> High CPU deviation (100-400%) is seen in the metrics view. The regression was caused
becase HostStats returns CPU usage in percentage and memory usage in bytes, while the deviation
calculation method did not assume that passed values are in percentage and multiples the ratios
by 100 resulting in 100x the actual values.



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