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https://issues.apache.org/jira/browse/EAGLE-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15074667#comment-15074667
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Libin, Sun commented on EAGLE-97:
---------------------------------
Add some more pattern
{code:title=GC Young, Tenured & Perm Area}
2014-08-13T12:22:25.488-0700: 144.526: [Full GC2014-08-13T12:22:25.488-0700:
144.526: [CMS: 9845647K->10115891K(97517568K), 14.2064400 secs]
10215536K->10115891K(100348736K), [CMS Perm : 24119K->24107K(24320K)],
14.2066090 secs] [Times: user=13.86 sys=0.32, real=14.20 secs]
{code}
{code:title=ConcurrentModeFailure}
(concurrent mode failure): 89131378K->75055239K(97517568K), 430.8303930 secs]
91834503K->75055239K(100348736K), [CMS Perm : 54559K->54414K(83968K)],
431.5362150 secs] [Times: user=574.23 sys=0.00, real=431.47 secs]
{code}
{code:title=ParaNewPromotionFailure}
*Pattern 1*
2014-07-08T21:52:32.910-0700: 2935883.704: [GC 2935883.704: [ParNew (promotion
failed): 2827840K->2824012K(2831168K), 0.8317310 secs]2935884.536: [CMS:
71633438K->38250633K(97517568K), 211.7852880 secs]
74430253K->38250633K(100348736K), [CMS Perm : 54880K->54867K(83968K)],
212.6173060 secs] [Times: user=0.00 sys=214.88, real=212.59 secs]
*Pattern 2*
2014-09-25T18:25:25.424-0700: 2568209.488: [GC2014-09-25T18:25:25.424-0700:
2568209.488: [ParNew (promotion failed): 4665858K->4627344K(4718592K),
1.2918500 secs]2014-09-25T18:25:26.716-0700: 2568210.780: [CMS:
74802314K->42339736K(95420416K), 230.2937730 secs]
79433462K->42339736K(100139008K), [CMS Perm : 49896K->49865K(83316K)],
231.5926250 secs] [Times: user=0.00 sys=233.73, real=231.56 secs]
*Pattern 3*
2014-09-16T02:10:29.456-0700: 1732113.520: [GC2014-09-16T02:10:29.456-0700:
1732113.520: [ParNew (promotion failed): 4703469K->4718592K(4718592K),
0.9636440 secs]2014-09-16T02:10:30.420-0700: 1732114.484:
[CMS2014-09-16T02:10:48.794-0700: 1732132.858: [CMS-concurrent-mark:
28.139/29.793 secs] [Times: user=214.69 sys=8.41, real=29.79 secs]
*Pattern 4*
2014-06-05T22:57:29.955-0700: 88580.749: [GC 88580.749: [ParNew (promotion
failed): 2809111K->2831168K(2831168K), 0.6941530 secs]88581.443:
[CMS2014-06-05T22:57:57.509-0700: 88608.303: [CMS-concurrent-sweep:
48.562/51.183 secs] [Times: user=138.07 sys=15.38, real=51.18 secs]
{code}
> Enable GC Log monitoring for important service like hadoop namenode
> -------------------------------------------------------------------
>
> Key: EAGLE-97
> URL: https://issues.apache.org/jira/browse/EAGLE-97
> Project: Eagle
> Issue Type: New Feature
> Affects Versions: 0.3.0
> Reporter: Libin, Sun
> Assignee: Libin, Sun
>
> Garbage Collection Monitoring refers to the process of figuring out how JVM
> is running GC.
> When GC happened, JVM will stop the application from running to execute a GC,
> every thread except for the threads needed for the GC will stop their tasks.
> The interrupted tasks will resume only after the GC task has completed, the
> stop interval is known as "stop-the-world"
> For service like namenode, GC will affect the performance, especially full
> GC, we should avoid full GC and if full GC happened, we should detected it
> ASAP and sent out alert
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