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Posted to issues@ignite.apache.org by "Vladislav Pyatkov (JIRA)" <ji...@apache.org> on 2016/05/20 11:04:12 UTC
[jira] [Commented] (IGNITE-2616) NonHeap memory usage metrics don't
work as expected.
[ https://issues.apache.org/jira/browse/IGNITE-2616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15293185#comment-15293185 ]
Vladislav Pyatkov commented on IGNITE-2616:
-------------------------------------------
I found some offheap metric issue:
{code}
cache.put(46744, "val " + 456);
String val = (String)cache.get(46744);
log.info("OffHeap put {} get {}", metrics.getOffHeapPuts(), metrics.getOffHeapGets());
log.info("OnHeap put {} get {}", metrics.getCachePuts(), metrics.getCacheGets());
{code}
In result had seen:
{noformat}
2016-05-20 12:22:09 INFO ServerNode:62 - OffHeap put 1 get 0
2016-05-20 12:22:09 INFO ServerNode:63 - OnHeap put 1 get 1
{noformat}
I think every value should by 1.
> 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
> 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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