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Java常见限流用法介绍和实现_java 限流-CSDN博客
目录 2) Demo 一、现象 为什么要限流:用于在高并发环境中保护系统资源,避免因过多请求导致系统崩溃 线上服务运行中,偶尔会遇见如Api服务瞬时请求流量过高,服务被压垮;数据处理服务处理消息队列数据,消费速度过快,导致处理性能下降甚至崩溃。 限流前:数据推送给服务处理时,速度过快,服务未限流,导致CPU突然暴涨达到临界值,处理性能底下 限流后:消费速度平稳,CPU平稳,未超限,内存上涨也未超限 可见限流是非常重要的! 二、工具 优点: 性能高:AtomicInteger 和 AtomicLong 基于 CAS(Compare-And-Swap)操作,能够实现高效的并发访问,适用于高并发场景。 轻量级:这些类作为 Java 标准库的一部分,无需引入额外的依赖,使用简单方便。 内存操作:AtomicInteger 和 AtomicLong 的操作都在内存中完成,避免了网络开销。 缺点: 单机限流:AtomicInteger 和 AtomicLong 主要适用于单机环境下的限流,对于分布式系统或微服务架构来说,可能需要额外的机制来实现全局限流。...
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