Скачать или смотреть Shenandoah the garbage collector that could by aleksey shipilev

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okay, let's dive deep into shenandoah, a cutting-edge garbage collector designed for low-pause-time applications in java. this comprehensive guide will cover its architecture, key concepts, configuration, and practical code examples to help you understand and utilize it effectively.

*i. introduction to shenandoah gc*

shenandoah is a concurrent, generational, region-based garbage collector for the hotspot jvm. it's designed to significantly reduce pause times, often targeting pauses measured in milliseconds, even with large heaps. it achieves this by performing most of its garbage collection work concurrently with the application threads.

*key goals of shenandoah:*

*low pause times:* minimize the time the application is paused for gc, aiming for sub-millisecond or low-millisecond pauses.
*concurrency:* perform as much gc work as possible concurrently with the application, avoiding long stop-the-world pauses.
*scalability:* handle large heaps (hundreds of gigabytes or even terabytes) efficiently.
*generational:* like many other modern gcs, shenandoah leverages the generational hypothesis: most objects die young.

*why use shenandoah?*

shenandoah is a good choice when:

*low latency is critical:* applications where long gc pauses are unacceptable (e.g., real-time systems, interactive applications, financial trading platforms).
*large heap sizes:* when your application requires a very large heap, and traditional gcs (like cms or even g1) struggle to keep pause times low.
*you're willing to accept a potential throughput trade-off:* shenandoah's focus on low pauses can sometimes come at the cost of slightly lower overall throughput compared to throughput-optimized gcs like parallel gc.

*ii. shenandoah architecture and key concepts*

shenandoah's architecture is quite sophisticated, but we can break it down into its essential components:

*regions:* the heap is divided into a set of equal-sized regions. ...

#Shenandoah #GarbageCollector #softwaredevelopment
Shenandoah
garbage collector
Aleksey Shipilev
Java
performance optimization
low-pause GC
memory management
JVM
concurrent collection
application throughput
latency reduction
adaptive sizing
heap management
garbage collection algorithms
Java Virtual Machine