elasticsearch jvm优化

最新推荐文章于 2025-09-14 14:01:13 发布

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最新推荐文章于 2025-09-14 14:01:13 发布 · 998 阅读

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本文详细介绍了在Elasticsearch环境下，如何使用jmap和jstat工具监测JVM堆内存配置，包括Young Gen和Old Gen的大小调整，并提供了具体的案例分析。

测试环境elasticsearch jvm 4G jdk1.8

[serveradm@test-log-server elasticsearch]$ java -version
java version "1.8.0_212"
Java(TM) SE Runtime Environment (build 1.8.0_212-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.212-b10, mixed mode)
[serveradm@test-log-server elasticsearch]$

-Xms4g
-Xmx4g

jmap -heap pid查看heap内存大小

复制代码

[serveradm@test-log-server elasticsearch]$ jmap -heap 11516
Attaching to process ID 11516, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.212-b10

using parallel threads in the new generation.
using thread-local object allocation.
Concurrent Mark-Sweep GC

Heap Configuration:
   MinHeapFreeRatio         = 40
   MaxHeapFreeRatio         = 70
   MaxHeapSize              = 4294967296 (4096.0MB)
   NewSize                  = 348913664 (332.75MB)
   MaxNewSize               = 348913664 (332.75MB)
   OldSize                  = 3946053632 (3763.25MB)
   NewRatio                 = 2
   SurvivorRatio            = 8
   Metaspace