Serial Collector Stops Application for Minor/Major GC

This section provides log messages showing that the Serial Collector stops the application for both Minor GC and Major GC.

One impact of using the Serial Collector is that it performs both Minor and Major collection in a stop-the-world fashion (application pause). Let's see if we can demonstrate this behavior in this tutorial.

C:\>\progra~1\java\jdk1.8.0\bin\java -Xms2m -Xmx64m -XX:+PrintGC
   -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime 
   -XX:+PrintGCTimeStamps -XX:+UseSerialGC GarbageCollection
   
Step/TotalMemory/FreeMemory/UsedMemory:
0.114: Application time: 0.0088216 seconds
   -- Application executed for 0.0088216 seconds with no stop

0.115: [GC (Allocation Failure)  878K->755K(1984K), 0.0017072 secs]
   -- Serial Collector did a Minor GC

0.117: Total time for which application threads were stopped: 0.0025561 s, 
   Stopping threads took: 0.0000456 seconds
   -- Serial Collector did stop the application for 0.0025561 seconds
    
1   2031616   698704   1332912
1.109: Application time: 0.9924986 seconds
   -- Application executed for 0.9924986 seconds with no stop

1.110: [GC (Allocation Failure)  1557K->1540K(2500K), 0.0054299 secs]
1.117: [Full GC (Allocation Failure)  1540K->1540K(2500K), 0.0052930 secs]
   -- Serial Collector did a Major (labeled as Full) GC

1.123: Total time for which application threads were stopped: 0.0135217 s,
   Stopping threads took: 0.0000990 seconds
   -- Serial Collector did stop the application for 0.0135217 seconds
 
2   3874816   1473136   2401680
2.128: Application time: 1.0044262 seconds
   -- Application executed for 1.0044262 seconds with no stop
   
2.130: [GC (Allocation Failure)  2601K->2580K(3784K), 0.0047073 secs]
   -- Serial Collector did a Minor GC

2.135: Total time for which application threads were stopped: 0.0064456 s,
   Stopping threads took: 0.0001472 seconds
   -- Serial Collector did stop the application for 0.0064456 seconds
  
3   3874816   425272   3449544
3.131: Application time: 0.9955077 seconds
   -- Application executed for 1.9955077 seconds with no stop

3.133: [GC (Allocation Failure)  3624K->3620K(4820K), 0.0055259 secs]
3.139: [Full GC (Allocation Failure)  3620K->3620K(4820K), 0.0057639 secs]
   -- Serial Collector did a Major (labeled as Full) GC
   
3.146: Total time for which application threads were stopped: 0.0136471 s,
   Stopping threads took: 0.0001502 seconds
   -- Serial Collector did stop the application for 0.0136471 seconds
... 

The GC log messages confirm that:

Last update: 2018.

Table of Contents

 About This Book

 Heap Memory Area and Size Control

 JVM Garbage Collection Logging

 Introduction of Garbage Collectors

Serial Collector - "+XX:+UseSerialGC"

 What Is Serial Collector

 GC Log Message Format for Serial Collector

 GC Log Message Examples of Serial Collector

 Log Message Types from Serial Collector

Serial Collector Stops Application for Minor/Major GC

 Usage Report on Heap Memory Areas

 Default NewRatio - Old vs. New Generation

 "-XX:NewRatio" - Ratio of Tenured and "new" Generation

 "-XX:SurvivorRatio" - Ratio of Eden and Survivor Space

 Serial GC Tracing - Tight Heap

 Serial GC Tracing - Plenty of Heap

 Serial GC Tracing - Aged Live Objects

 Serial GC Tracing - Tenuring Threshold

 "-XX:TargetSurvivorRatio" - Second Tenuring Condition

 Serial GC Tracing - Tenuring Threshold Controlled

 "-XX:+NeverTenure" and "-XX:+AlwaysTenure" not Working

 Minor GC Triggering Condition of Serial Collector

 Parallel Collector - "+XX:+UseParallelGC"

 Concurrent Mark-Sweep (CMS) Collector - "+XX:+UseConcMarkSweepGC"

 Garbage First (G1) Collector - "+XX:+UseG1GC"

 Object References and Garbage Collection

 Garbage Collection Performance Test Program

 Performance Tests on Serial Collector

 Performance Tests on Parallel collector

 Performance Tests on Concurrent collector

 Performance Tests on G1 collector

 Garbage Collection Performance Test Summary

 Outdated Tutorials

 References

 Full Version in PDF/EPUB