Cassandra 数据库 垃圾回收 GC 日志分析与优化

Cassandra 数据库阿木 发布于 2025-07-04 25 次阅读

摘要：

Cassandra 是一款分布式 NoSQL 数据库，以其高可用性和可伸缩性著称。Cassandra 的垃圾回收（GC）策略对性能有着重要影响。本文将围绕 Cassandra 数据库的 GC 日志进行分析，并提出相应的优化策略，以提高数据库的性能和稳定性。

一、

Cassandra 的垃圾回收（GC）是维护数据库性能的关键环节。GC 的目的是回收不再使用的内存空间，以释放资源供其他操作使用。不当的 GC 策略可能导致性能下降，甚至引发 OOM（Out of Memory）错误。对 Cassandra 数据库的 GC 日志进行分析和优化至关重要。

二、Cassandra GC 日志分析

1. GC 日志概述

Cassandra 的 GC 日志记录了 GC 的执行情况，包括 GC 类型、执行时间、回收的内存大小等信息。以下是一个简单的 GC 日志示例：

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2019-07-01T15:30:00.000+0000: [GC (Concurrent Mark Sweep) 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 348.731: 348.731] 348.731: [CMS: 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