k8s中tomcat项目jvm参数设置

时间 2019-11-06

标签 k8s tomcat 项目 jvm 参数设置栏目 Tomcat 繁體版

原文原文链接

k8s集群方便了部署。可是也带来了其余问题，好比随着服务不断的增长，内存+cpu不断的新增，成本也在增长。tomcat

早期的先后台项目都采用的是tomcat8做为服务器容器，对应的jvm配置以下：bash

kubectl get pod -n namespace podName -o yaml服务器

containers:
- env:
  - name: JAVA_OPTS
    value: -server -Xmx3550m -Xms3550m -Xmn2g -Xss256k -Duser.timezone=GMT+8 -XX:+DisableExplicitGC
        -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m
        -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70

对应在阿里云控制台查看yaml文件：jvm

containers:
  - env:
      - name: JAVA_OPTS
        value: >-
          -server -Xmx3550m -Xms3550m -Xmn2g -Xss256k
          -Duser.timezone=GMT+8 -XX:+DisableExplicitGC
          -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled
          -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods
          -XX:+UseCMSInitiatingOccupancyOnly
          -XX:CMSInitiatingOccupancyFraction=70

再好比更小的配置：阿里云

kubectl get pod -n namespace2 podName2 -o yamlspa

containers:
- env:
  - name: JAVA_OPTS
    value: -server -Xmx2000m -Xms2000m -Xmn800m -Xss512k -Duser.timezone=GMT+8 -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70

对应阿里云控制台的yaml配置：code

containers:
  - env:
    - name: JAVA_OPTS
      value: >-
        -server -Xmx2000m -Xms2000m -Xmn800m -Xss512k
        -Duser.timezone=GMT+8 -XX:+DisableExplicitGC
        -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled
        -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods
        -XX:+UseCMSInitiatingOccupancyOnly
        -XX:CMSInitiatingOccupancyFraction=70

这里涉及jvm调优。server