How to Analyze GC Log | JVM Garbage Collection Analysis | JVM Performance troubleshooting | JAVA

#java #JvmPerformanceAnalysis #GCLogAnalysis #HeapDumpAnalysis
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► Important Information about this Tutorial
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Java Virtual Machine (JVM) generates 3 critical artifacts that are useful for optimizing the performance and troubleshooting production problems. Those artifacts are:
Garbage collection (GC) log
Thread Dump
Heap Dump
Garbage Collection Log
a) What Is a GC Log?
GC Log contains garbage collection events related information. It will indicate how many GC events ran, what type of GC events they are (i.e. Young GC or Full GC), how long each GC event pause the application, how much objects did each GC event reclaim.
b) What Does a GC Log Look Like?
Sample garbage collection log file can be found here.
c) Where Are GC Logs Used?
Garbage collection logs are used to study the application’s GC and memory performance. It’s used to optimize the GC pause times, it’s used to identify optimal memory size for your application, it’s also used to troubleshoot memory-related problems.
d) How to Generate a GC Log?
-XX:+PrintGCDetails or Xlog:gc*
-Xloggc:gclog.log or -Xlog:gc:gclog.log
Other Options ::
-XX:+DisableExplicitGC
-XX:+PrintGCDetails
-XX:+PrintGCApplicationStoppedTime
-XX:+PrintGCApplicationConcurrentTime
-XX:+PrintGCDateStamps
-Xloggc:gclog.log
-XX:+UseGCLogFileRotation
-XX:NumberOfGCLogFiles=5
-XX:GCLogFileSize=2000k
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[@computer_science10]

GC Logs Analyzer
What is a GC log ?
Where are gc logs used ?
What does a GC log look like ?
How to generate a GC Log ?
How to Analyze GC log and Different Parameters

[@TechTalkDebu]

GC : garbage collector logs …. Used to check how jvm doing garbage collection properly…. Is there any issues while garbage collection … this gc important for jvm performance and dealocate unused object space

[@user-pc1pm1vb7p]

can you suggest me some jvm parameter to optimize gc , when gc is not working properly ?

[@TechTalkDebu]

Use G1 if you are using Java 8 .. else lesser for parallel gc