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From "Vladislav Pyatkov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-2616) NonHeap memory usage metrics don't work as expected.
Date Thu, 02 Jun 2016 16:22:59 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-2616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15312579#comment-15312579
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Vladislav Pyatkov commented on IGNITE-2616:
-------------------------------------------

[~dmagda] Thanks for the review
I made changes after.
He underwent a test in ClusterNodeMetricsSelfTest, but I think this test is not passed before.
Can you review the changes again?

> NonHeap memory usage metrics don't work as expected.
> ----------------------------------------------------
>
>                 Key: IGNITE-2616
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2616
>             Project: Ignite
>          Issue Type: Bug
>          Components: general
>    Affects Versions: 1.5.0.final
>            Reporter: Vladimir Ershov
>            Assignee: Vladislav Pyatkov
>            Priority: Minor
>         Attachments: ClusterMetricsOnCacheSelfTest.java
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> This simple code:
> {noformat}
>     public static void main(String ... args) {
>         MemoryMXBean mxBean = ManagementFactory.getMemoryMXBean();
>         System.out.println(mxBean.getNonHeapMemoryUsage());
>         GridUnsafeMemory uMem = new GridUnsafeMemory(1024L * 1024 * 1024 * 3); //3GB
>         System.out.println(mxBean.getNonHeapMemoryUsage());
>         uMem.allocate(1024 * 1024 * 1024, true, false);
>         System.out.println(mxBean.getNonHeapMemoryUsage());
>         uMem.allocate(1024 * 1024 * 1024, true, true);
>         System.out.println(mxBean.getNonHeapMemoryUsage());
>     }
> {noformat}
> shows: 
> {noformat}
> init = 2555904(2496K) used = 4783352(4671K) committed = 8060928(7872K) max = -1(-1K)
> init = 2555904(2496K) used = 5018704(4901K) committed = 8060928(7872K) max = -1(-1K)
> init = 2555904(2496K) used = 5018960(4901K) committed = 8060928(7872K) max = -1(-1K)
> init = 2555904(2496K) used = 5018960(4901K) committed = 8060928(7872K) max = -1(-1K)
> {noformat}
> which means: offHeap metrics are incorrect. The  problem is: Apache Ignite uses that
MemoryMXBean  for collecting metrics, thus Apache Ignite offHeap metrics are incorrect too.
We should find the way to fix this, if there are any.



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