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Class Loading Followed by Class Initialization
This section provides a tutorial example showing that class initialization happens immediately after class loading.
2022-10-01, ∼273🔥, 0💬

Generational Garbage Collection in HotSpot
This section describes the generational garbage collection architecture used in the HotSpot JVM. Young Generation stores objects with shorter lives and Tenured Generation stores objects with longer lives.
2022-10-01, ∼273🔥, 0💬

Tenured Generation Collection - Major GC
This section describes basic steps of a Tenured Generation Collection, also called a Major GC, which uses a simple 3-step Mark-Sweep-Compact algorithm on the entire Tenured Generation.
2022-10-01, ∼271🔥, 0💬

GCPerformance.java - Program Output
This section describes output data generated by the GC tuning test program - GCPerformance.java.
2022-10-01, ∼270🔥, 0💬

Performance Impact of Wait Time
This section provides tests to find out performance impact of the wait time between each chunk operations. Increasing wait time seems to decrease throughput performance.
2022-10-01, ∼270🔥, 0💬

Young Generation Collection - Minor GC
This section describes basic steps of a Young Generation Collection, also called a Minor GC. The Young Generation is divided into 3 areas: Eden, Survivor Space 'From' and Survivor Space 'To'.
2022-10-01, ∼270🔥, 0💬

Micro Benchmark Tests on "int" Operations
This chapter provides tutorial notes and example codes on micro benchmark tests on 'int' data type operations. Topics include empty loop, assignment loop, shift operation, add operation, multiplication operation and division operation.
2022-10-01, ∼269🔥, 0💬

Adaptive Size Policy Log Messages
This section provides examples and explanations of log messages generated '-Xlog:gc+ergo=debug' and '-XX:AdaptiveSizePolicyOutputI nterval=1'JVM options used with the Parallel collector.
2022-10-01, ∼269🔥, 0💬

Adaptive Size Policy Changed Eden Space
This section provides a tutorial on how Adaptive Size Policy used by the Parallel collector changed the eden space in the Young generation to meet the throughput goal.
2022-10-01, ∼269🔥, 0💬

Serial GC Tracing - Tenuring Threshold Controlled
This section provides a tutorial showing how to control Serial collector Tenuring threshold with InitialTenuringThreshold and MaxTenuringThreshold JVM options.
2022-10-01, ∼269🔥, 0💬

Executing System Commands
This section provides a tutorial example on how to execute system commands as separate processes outside the JVM instance.
2022-10-01, ∼268🔥, 0💬

What Is java.lang.ClassLoader Class
This section describes what is java.lang.ClassLoader class - A built-in abstract class that represents ClassLoaders used in JRE to load dynamically Java classes into the JVM.
2022-10-01, ∼267🔥, 0💬

Parallel Collector Stopped using Young Generation
This section provides a tutorial on how Adaptive Size Policy is used by the Parallel collector to our best latency goal.
2022-10-01, ∼263🔥, 0💬

Parallel Collector Stops Application for Minor/Major GC
This section provides log messages showing that the Parallel Collector stops the application for both Minor GC and Major GC.
2022-10-01, ∼262🔥, 0💬

Serial GC Tracing - Tight Heap
This section provides a tutorial on tracing how Serial GC works with a tight heap size.
2022-10-01, ∼260🔥, 0💬

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.
2022-10-01, ∼258🔥, 0💬

Memory Allocation Limits on Windows Systems
This section provides a tutorial example on how JVM expands the Heap space to allocate more objects and leads to the 'java.lang.OutOfMemoryError: Java heap space' Java exception, if it is not allowed to expand any more.
2022-10-01, ∼258🔥, 0💬

Log Message Types from Serial Collector
This section describes 4 types of log messages generated from the Serial Collector with the '-XX:+PrintGCDetails'.
2022-10-01, ∼258🔥, 0💬

Adaptive Size Policy for Best Latency
This section provides a tutorial on how Adaptive Size Policy is used by the Parallel collector to our best latency goal.
2022-10-01, ∼258🔥, 0💬

References
List of reference materials used in this book.
2022-10-01, ∼257🔥, 0💬

Log Message Types from Serial Collector
This section describes various types of log messages generated from the Serial Collector with the '-Xlog:gc*=debug' option.
2022-10-01, ∼255🔥, 0💬

OpenJ9 by Eclipse Foundation
This chapter provides tutorial notes and example codes on OpenJ9 JVM. Topics include downloading and installing OpenJ9; running Java programs on OpenJ9 JVM; memory footprint of OpenJ9 JVM; comparison of startup time and footprint between OpenJ9 and HotSpot.
2022-10-01, ∼254🔥, 0💬

Serial GC Tracing - Plenty of Heap
This section provides a tutorial of tracing how Serial GC works with a huge heap size, plenty of memory in 'new' generation.
2022-10-01, ∼254🔥, 0💬

Performance Tests on Parallel collector
This chapter provides tutorial notes and example codes on performance impact of Parallel collector, Topics include heap footprint; heap size impact; running Young GC only, running more Old GC.
2022-10-01, ∼253🔥, 0💬

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