[mod_cluster-issues] [JBoss JIRA] Updated: (MODCLUSTER-157) SystemMemoryUsageLoadMetric returns wrong load metric

[Paul Ferraro (JIRA)]

     [ https://jira.jboss.org/jira/browse/MODCLUSTER-157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Ferraro updated MODCLUSTER-157:
------------------------------------

        Fix Version/s: 1.1.0.CR3
    Affects Version/s: 1.1.0.CR2
                           (was: 1.0.2.GA)


> SystemMemoryUsageLoadMetric returns wrong load metric
> -----------------------------------------------------
>
>                 Key: MODCLUSTER-157
>                 URL: https://jira.jboss.org/jira/browse/MODCLUSTER-157
>             Project: mod_cluster
>          Issue Type: Bug
>    Affects Versions: 1.0.3.GA, 1.1.0.CR2
>            Reporter: Masafumi Miura
>            Assignee: Jean-Frederic Clere
>             Fix For: 1.0.4.GA, 1.1.0.CR3
>
>
> When using SystemMemoryUsageLoadMetric, mod_cluster prioritizes dispatching requests to a machine which are using system memory higher than other machines. This loadbalancing behaviour is odd.
> SystemMemoryUsageLoadMetric[1] returns wrong load metric. The SystemMemoryUsageLoadMetric#getLoad() should not return "free / total". It should return "(total - free) / total" (= usage / total ) like HeapMemoryUsageLoadMetric[2].
> [1] http://anonsvn.jboss.org/repos/mod_cluster/tags/1.0.3.GA/src/main/java/org/jboss/modcluster/load/metric/impl/SystemMemoryUsageLoadMetric.java
> [2] http://anonsvn.jboss.org/repos/mod_cluster/tags/1.0.3.GA/src/main/java/org/jboss/modcluster/load/metric/impl/HeapMemoryUsageLoadMetric.java

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