python garbage collection example

the concept of root set. The Garbage Collector Based on the tracing algorithm scans the root set to identify which objects are reachable and which objects are not reachable, and marks the reachable objects in some way, for example, you can set one or more places for each reachable object. In the scanning and identification process, the garbage

allocation and recovery. Java platform uses the Garbage Collector for automatic memory management. This greatly reduces the workload of developers. I. Java garbage collection mechanism The Java garbage collector is responsible for completing three tasks: 1. allocate memory 2. Ensure that the memory of the referenced

suitable for single processor machines. Of course, this collector can also be used on multiprocessor machines with small amounts of data (around 100M). You can use-XX:+USESERIALGC to open it.Parallel CollectorFigure 9 Parallel collector Parallel garbage collection for young generations can reduce garbage collection t

counting. It uses the concept of root set. The Garbage Collector Based on the tracing algorithm scans the root set to identify which objects are reachable and which objects are not reachable, and marks the reachable objects in some way, for example, you can set one or more places for each reachable object. In the scanning and identification process, the garbage

collector). Conclusion The focus of this article is not to persuade you to use different programming languages or tools. Just want to bring the right understanding of the garbage collector. Garbage collection is a very challenging job, and many computer scientists have spent decades on it, so it is unlikely that a new GC algorithm will be available one night,

run2. Use System.GC () to request Java garbage collection regardless of which garbage collection algorithm the JVM is using. There is a parameter in the command line-VERBOSEGC can view the heap memory used by Java, which is in the following format:JAVA-VERBOSEGC ClassfileYou can look at an example:Class TESTGC{public

Serial collector for JAVA Garbage Collector and serial for garbage collection 1. Features The Serial collector is the most basic and oldest collector in the Java Virtual Machine. It was the only choice for collecting new generations of Java virtual machines before JDK 1.3.1. The Serial collector is a single-threaded collector, but its "Single-threaded" doesn't ju

algorithmGarbage collector.Perspective Java Garbage Collection1. Command line parameter perspective garbage collector run2. Use System.GC () to request Java garbage collection regardless of which garbage collection algorithm the

characteristics of each block. Taking hot Spot virtual machine As an example, it divides the Java heap into Cenozoic and old generation, so that the most appropriate collection algorithm can be used according to the characteristics of each age. Garbage collector classification The hotspot virtual machine that is based on JDK 1.7 Update 14 contains all the

alternately. Each time, the garbage collection thread collects only a small area of memory space, and then switches to the application thread. Repeat until garbage collection is complete. In this way, due to the intermittent execution of the application code during the garbage