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Questions tagged [garbage-collecting]

29 questions
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tomcat8: 'free(): corrupted unsorted chunks'

We upgraded from Ubuntu 16LTS to Ubuntu 18LTS a couple of days ago and since then have had Apache Tomcat crash completely twice (once per day, about 25 hrs apart). The java process stops running. One line is added to the log file at this…
Oliver Kohll
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Tomcat 7 server experiencing a sudden (order of magnitude) increase of the Young GC frequency after upgrade of Ubuntu and OpenJDK

What is the issue? After upgrading instances to Ubuntu 16.04 LTS and OpenJDK 8 the GC frequency can, after hours of normal operation, suddenly increase by orders of magnitude ending up using less than 10% of the HEAP. We have analyzed the GC logs…
Daniel Sandberg
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WebLogic server seems to freeze after CMS Garbage Collection run

We're using Java Hotspot 1.6 with a 10.3.6 WebLogic Cluster with 2 nodes running OSB 11.1.1.7 behind a physical load balancer: java version "1.6.0_91" Java(TM) SE Runtime Environment (build 1.6.0_91-b13) Java HotSpot(TM) 64-Bit Server VM (build…
Franco
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Monitoring Java garbage collector and memory status

I'm running some Rails applications on Jboss with JRuby. Sometimes the Java garbage collector can't free memory and the jvm consume all the available memory. I'm trying to create a custom metric with jstat, but can't figure out some valuable stats…
Felipe Rojas
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Tomcat CPU and GC going crazy

Having some major issues with our Tomcat 7 installation. It used to run fine for over a year, but now the CPU is mainly at 400% - 700% (8 core machine) and in the logs I see tones of these: 2015-04-01T23:05:13.046+0200: 5177.229:…
Nitai
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Discrepancy in java Garabage Collection between jconsole and log files

I'm having an odd problem: my garbage collection log file (as defined by -Xloggc) will show n number of garbage collections have taken place, but jconsole will show n+6 garbage collections have taken place. I'm using the ConcurrentMarkSweep (aka…
Richard D Lawson
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When the JVM is doing a complete GC, is it expected to see a large number of page fault/sec?

It is Window 2003 server. We are running some performance test, and what we see is: 1. In first 5 hours, the page fault/sec is very small, like 10 or 20 In the last 1 hour, the page fault jumps to 500 page fault/sec In the last 1 hour, we see the…
performanceuser
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JVM garbage collection: What is the difference between "survivor 1" and "survivor 2"?

In Oracle's Java Virtual Machine's Garbage Collector, what are the respective roles of "survivor 1" and "survivor 2" ? Are the objects always moving like: Eden → Survivor 1 → Survivor 2 Or can an object jump directly from Eden to Survivor 2? Would a…
Nicolas Raoul
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Frequent occurence of FULL GC

There is a frequent occurence of FULL GC in our system. We are using Java application running on Tomcat server. Our application is running using internal load balancer setup. We are seeing lot of Full GC's in the server logs due to which the…
Viji
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PowerShell ForEach-Object Parallel RAM Memory Keeps Growing

Using PS 7.3.4 The code works fine without errors. Issue - the RAM consumed by the script keeps growing. How do I release the RAM? How do I see what is consuming the RAM? Any suggestions will be greatly apprciated. Memory results after processing…
Mike T
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PHP5 to PHP7 unexpected increase in memory usage inside container

Last week we updated several wordpress sites which are running Alpine Linux as containers inside a host (Ubuntu 20.04) through LXD. A summary of the update is as follows: Alpine Linux v3.8 -> 3.14 PHP 5.3.6 -> 7.4.24 Wordpress 5.0.3 ->…
lepe
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Why is the max heap much smaller than the value I set in Xmx (with -XX:+UseParallelGC -XX:+UseParallelOldGC)

I am running a SolrCloud on k8s with the following setting: Heap params: -server -Xms280m -Xmx312m Other params: -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+UseAdaptiveSizePolicy -XX:ParallelGCThreads=4 -XX:AdaptiveSizePolicyOutputInterval=1…
John the Traveler
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Empty LAMP Sessions

I have a LAMP server. Users log in and authenticate against the MySQL database. After successful authentication, session_start() is called. At no point is regenerate_session_id() called. I'm experiencing multiple empty PHP/apache sessions being…
mahbad
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High CPU being caused by garbage collection in w3wp.exe

I am having a problem with High CPU happening on my my website in IIS8. This happens randomly and not very often but it does happen especially when the load is heavy on the site. The only way to stop it is to End Task on the w3wp.exe process and…
exposure
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