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Serial GC Tracing - Aged Live Objects
This section provides a tutorial of tracing how Serial GC increases the age of objects survived each additional GC in 'from' space.
2022-10-01, ∼234🔥, 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, ∼234🔥, 0💬

Archived: Installing JRockit JVM 7.0
This section provides a tutorial example on how to download and install JRockit 7.0 on Windows systems.
2022-10-01, ∼233🔥, 0💬

JVM Memory Manager - Garbage Collector
This section describes what is a garbage collector and its role and responsibilities for managing the JVM memory.
2022-10-01, ∼233🔥, 0💬

ClassChecker.java - Reports Class Loader
This section provides a tutorial example, ClassChecker.java, which reports the class loader by the JVM to load a given class.
2022-10-01, ∼232🔥, 0💬

GCPerfP99.java - Output Verification
This section provides tutorials to verify output from GCPerfP99.java test runs. System interrupts are successfully excluded from performance calculation.
2022-10-01, ∼232🔥, 0💬

Heap Memory Area and Size Control
This chapter provides tutorial notes and example codes on heap memory area. Topics include OutOfMemoryError exception; Heap memory area allocation limits; OutOfMemoryError comparison of HotSpot and JRockit.
2022-10-01, ∼232🔥, 0💬

archived: Download and Install JDK 14 on macOS
This section provides a tutorial example on how to download and install the latest version JDK, which contains the HotSpot JVM, on a macOS system. A simple Java program was entered, compiled, and executed to verify the JDK installation.
2024-03-12, ∼229🔥, 0💬

Usage Report on Heap Memory Areas
This section provides explanations of the usage report on heap memory areas generated by the '-XX:+PrintGCDetails' option.
2022-10-01, ∼229🔥, 0💬

GCPerfP99.java - Output Verification
This section provides tutorials to verify output from GCPerfP99.java test runs. System interrupts are successfully excluded from performance calculation.
2022-10-01, ∼227🔥, 0💬

What Is Parallel Collector
This section describes the Parallel Collector, which uses the combination of the Parallel Scavenge (PS) Collector of Young generation and the Parallel Old Collector of Tenured generation, so both minor GC and major GC are performed in multiple threads parallelly in a stop-the-world fashion.
2022-10-01, ∼226🔥, 0💬

ParNew Collector - Tenuring Age Distribution
This section demonstrates that the ParNew Collector uses Tenuring Age Distribution to perform Young generation GC.
2022-10-01, ∼225🔥, 0💬

GCPerformance.java - Program Output
This section describes output data generated by the GC tuning test program - GCPerformance.java.
2022-10-01, ∼225🔥, 0💬

OutOfMemoryError Comparison of HotSpot and JRockit
This section provides a tutorial example to compare the OutOfMemoryError exception between HotSpot 12, 10, 1.8, 1.7, 1.6 and JRockit 28.2.7.
2022-10-01, ∼219🔥, 0💬

Garbage Collection Performance Test Program
This chapter provides tutorial notes and example codes on garbage collection performance test programs. Topics include throughput performance calculation; latency performance calculation; operating system interruptions; P99 (99th Percentile) performance; running JVM with highest priority.
2022-10-01, ∼219🔥, 0💬

GCPerfP99V2.java - Work Load Level
This section provides tutorials to find the work load level for the GCPerfP99V2.java program to the impact of execution environment interruptions to a very level. Work load of 1000 gives me a coefficient variation of 1.22% on my computer used in 2019.
2022-10-01, ∼217🔥, 0💬

Parallel Collector Adaptive Size Policy
This section describes the Adaptive Size Policy supported by the Parallel Collector to dynamically change heap generation sizes to latency, throughput and footprint goals sequentially.
2022-10-01, ∼214🔥, 0💬

Best Garbage Collector and Configuration
This section describes the best garbage collector and configuration for our performance test program, GCPrefp99.java.
2022-10-01, ∼214🔥, 0💬

What JRockit Management Console
This section describes the Oracle JRockit Management Console which a GUI tool to monitor and manage JRockit JVM. It is part of the JRockit Mission Control tool set.
2022-10-01, ∼213🔥, 0💬

Thread Test on HotSpot 1.6
This section provides a tutorial example to see how many running threads can be supported on HotSpot 1.6.0_02 Client and Server JVMs.
2022-10-01, ∼213🔥, 0💬

Performance Tests on Concurrent collector
This chapter provides tutorial notes and example codes on performance impact of Concurrent collector, Topics include heap footprint; heap size impact; running minor GC only; running more major GC; impact of parallel threads; impact of concurrent threads.
2022-10-01, ∼212🔥, 0💬

Archived: 1076/800/80MB Test on HotSpot Client 1.6
This section provides a tutorial example on running GCTest2.java on HotSpot Client JVM 1.6.0_45 with 1076MB memory limit and a 800MB base plus 80MB fluctuating memory usage with object size of 1.25MB.
2022-10-01, ∼211🔥, 0💬

Archived: Download and Install Latest JDK 10 on Windows
This section provides a tutorial example on how to download and install the latest version JDK, which contains the HotSpot JVM, on a Windows system. A simple Java program was entered, compiled, and executed to verify the JDK installation.
2022-10-01, ∼210🔥, 0💬

OutOfMemoryError Comparison of HotSpot and JRockit
This section provides a tutorial example to compare the OutOfMemoryError exception between HotSpot 1.8, 1.7, 1.6 and JRockit 28.2.7.
2022-10-01, ∼210🔥, 0💬

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