concurrent-mark-sweep Questions
5
I'm currently having problems with very long garbage collection times. please see the followig. My current setup is that I'm using a -Xms1g and -Xmx3g. my application is using java 1.4.2. I don't h...
Blandina asked 25/1, 2012 at 15:49
4
I'm seeing the following symptoms on an application's GC log file with the Concurrent Mark-Sweep collector:
4031.248: [CMS-concurrent-preclean-start]
4031.250: [CMS-concurrent-preclean: 0.002/0.00...
Accumulator asked 25/5, 2010 at 16:53
1
Solved
What's the difference between cms and g1 garbage collector which makes g1 better?
Most of places it is said that this is because in G1, heap is divided into regions
and then collection of regions a...
Raincoat asked 2/1, 2021 at 6:46
1
Solved
I need some clarification about how minor gc collections behave. calling a() or calling b() in a long-lived application, if they could behave worstly when old space gets bigger
//an example insta...
Harbinger asked 19/11, 2019 at 0:3
4
I have a strange issue with one of my production machines. It hosts a Java application that does CMS (concurrent mark and sweep), but it cleans up just a small part of the old generation. I suspect...
Chinkiang asked 23/12, 2015 at 8:15
2
Solved
I have a Java application using CMS garbage collection that suffers from a "ParNew (promotion failed)" full GC a few times every day (see below for an example). I understand that a promotion failur...
Langmuir asked 22/12, 2014 at 9:33
3
I see many unloading of classes and my entire system will hang during that period of time..
[Unloading class sun.reflect.GeneratedMethodAccessor117]
[Unloading class sun.reflect.GeneratedConstruct...
Velarize asked 20/1, 2014 at 9:20
1
Solved
As far as I know we can run JVM with the next options:
-XX:+UseConcMarkSweepGC
-XX:-UseParNewGC
in this case we will have the Serial (DefNew) garbage collector for the young generation and the C...
Impenetrability asked 10/12, 2013 at 15:38
2
Solved
Has anyone managed to use the Concurrent Mark Sweep garbage collector (UseConcMarkSweepGC) in Hotspot with more than 120GB RAM?
The JVM starts just fine if I set -ms and -mx to 120G, but if I set t...
Waylay asked 17/6, 2012 at 20:37
1
Solved
I am confused about two parameters that may control when the CMS collector kicks in:
MaxHeapFreeRatio (70% by default)
CMSInitiatingOccupancyFraction (over 90% by default)
What does each of thos...
Palaeozoology asked 14/3, 2012 at 7:46
4
Solved
Short form: The CMS garbage collector appears to be failing to collect an ever-increasing amount of garbage; eventually, our JVM fills up, and the application becomes unresponsive. Forcing a GC via...
Selfcontent asked 6/10, 2010 at 14:36
1
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