With j7u5, G1GC "-Xms3200m -Xmx3200m -XX:+UseG1GC -XX:ParallelGCThreads=14 -XX:ConcGCThreads=4 -XX:MaxGCPauseMillis=40 -XX:NewRatio=2 -XX:SurvivorRatio=10 -XX:+PrintGC -XX:+PrintGCDateStamps" fo...

I wonder what the official status of the "garbage first" (G1) collector in the JDK 7 release is. I would like to use G1 as a low pause gc alternative to CMS, but only if I can really trust on its r...

I set ParallelGCThreads=1 and use G1 GC, all other JVM settings are default. I run PageRank on Spark-1.5.1 with two EC2 nodes 100 GB heap each. My heap usage graph is below (Red area: young genera...

Java 7 has been out for a while now, but I cannot find any good resources on the configuration of the garbage collectors, specifically the new G1 collector. My questions: Is G1 the default colle...

In the context of an in-memory database, we are using off-heap memory in conjunction to the G1 collector of hotspot. However, when off-heap memory usage reaches MaxDirectMemorySize, a full GC is t...

I was wondering if someone is able to explain to me how to interpret some G1 GC logs that lead up to an OutOfMemoryError? I know that a heap dump is the best bet for finding out what is actually u...

When I enable G1 in java application with -Xmx=1024m -XX:+UseG1GC. And using jvisualvm command to check max heap size. The max heap size is 2GB instead of 1GB. Does anybody know why ?

While moving from CMS to G1 for some of our applications, I noticed that one of them suffered from a startup time extended by factor 4. Application stop time due to GC cycles is not the cause. On c...

In Java 8 Update 45, adding these options to the java call: -XX:+PrintGCApplicationStoppedTime -XX:+PrintSafepointStatistics -XX:PrintSafepointStatisticsCount=1 shows me statistics like these: ...

I am running a build system. We used to use CMS collector, but we started suffering under very long full GC cycles, throughput (time not doing GC) was around 90%. So I now decided to switch to G1 w...

We have a fairly big application running on a JBoss 7 application server. In the past, we were using ParallelGC but it was giving us trouble in some servers where the heap was large (5 GB or more) ...

I am running a Java program with the G1 garbage collector using the following options: -XX:-UseBiasedLocking -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -verbose:gc -XX:+PrintGCTimeStamps -XX...

I'm currently evaluating the G1 garbage collector and how it performs for our application. Looking at the gc-log, I noticed a lot of collections have very long "Scan RS" phases: 7968.869: [GC paus...

I am using java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09-b05) Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode) with G1 garbage collector. JVM argumens are...

I have hit counter running on Java. It works 24 hours and hits pass at about 100 times per second. During the day GC processing time slowly rises from 20-60 ms till 10000-60000 ms and then drops to...

I've noticed occasional full GC's in my application using the G1 garbage collector, and am trying to figure out why they happen. The cycle from one region-scan-start to the next is excerpted belo...

Just curious. I heard something about the new G1GC addressing that latency problem. I can't / don't want to use RTSJ. Thanks in advance

I am using the G1 garbage collector with JDK1.7.0, but the VM does not recognize the option G1YoungGenSize. Specifically, when I run: java -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1Young...

I'd like to know what are the experiences with G1 garbage collector in newest JDK? I see NullPointerException thrown in my program, although code didn't change and behave correctly in earlier JDKs....