zoukankan      html  css  js  c++  java
  • 查看进程CPU、内存使用情况

    本文介绍通过ps和top查看进程的cpu、内存等使用情况。

    1.ps命令

    1.1 概览

    ps命令相关参数定义:

    • -e 或者-A,选择所有的进程;
    • -L 显示线程;
    • -o 自定义输出格式;

    输出格式:

    C    cpu使用百分比,为”使用的CPU时间/进程启动到现在的时间”
    STIME 启动时间,小于24小时,格式为”HH:MM”,否则为“mmm dd”为 month day
    TIME 累计使用CPU时间(user+system)
    LWP 线程ID;
    NLWP 当前进程中的线程数;
    
    $ ps -ef |grep  orange
    UID   PID  PPID  C  STIME  TTY          TIME    CMD
    root     18666     1  0 Sep13 ?    00:00:00 /usr/local/orange_service/orange /usr/local/orange_service/orange_log.conf
    root     18667 18666 13 Sep13 ?    7-12:15:51 /usr/local/lorange_service/orange /usr/local/orange_service/orange_log.conf
    

    1.2 查看线程

    $ ps -eLf | grep orange
    UID  PID  PPID   LWP   C  NLWP STIME TTY TIME CMD
    root     18666     1       18666       0    1   Sep13 ?     00:00:00     /usr/local /orange /usr/local/orange_log.conf
    root     18667  18666      18667       0    6   Sep13 ?      00:00:01   /usr/local /orange /usr/local/orange_log.conf 
    root     18667  18666      18668       0    6   Sep13 ?      00:00:00 /usr/local /orange /usr/local/orange_log.conf
    root     18667  18666     18669       12    6   Sep13 ?      7-01:27:27 /usr/local /orange /usr/local/orange_log.conf
    root     18667  18666     18671       0    6   Sep13 ?      00:00:02  /usr/local /orange /usr/local/orange_log.conf
    root     18667  18666     18672       0    6    Sep13 ?      10:45:49 /usr/local /orange /usr/local/orange_log.conf
    root     18667  18666     18673       0    6   Sep13 ?      00:02:30 /usr/local /orange /usr/local/orange_log.conf
    

    1.3 自定义参数的使用

    -p 指定进程ID
    -o 自定义输出格式;

    $ ps -p 1813 –o pid,ppid,lstart,etime,args
      PID    PPID                  STARTED     ELAPSED    COMMAND
     1813     1     Mon Aug 29 15:01:33 2016 71-02:34:45 /usr//sbin/zabbix_agentd
    

    lstart:详细的启动时间;
    etime: 从进程启动到现在消逝的时间;
    time: 累计消耗的cpu时间;
    tid或者lwp:线程ID;
    nlwp: 当前进程中的线程数;
    %cpu: 该进程使用的CPU百分比;含义参考ps输出格式中的”C”字段; CPU定义:进程占用CPU时间除以进程启动以来执行的时间;这个值不可能达到100%。与top命令的CPU不一样。
    %mem: 当前进程的常驻内存(resident set size)占机器物理内存的百分比;即top命令显示的%MEM字段;
    rss: 当前进程常驻内存大小(resident set size),单位kiloBytes;
    vsize: 或者vsz,当前进程占用的VM虚拟内存大小,单位kB;
    注意自定义参数之前使用逗号分隔,没有空格;

    2.top命令

    再来看一下top命令:

    $ top
    Tasks: 248 total,   1 running, 247 sleeping,   0 stopped,   0 zombie
    Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
    Mem:  16079044k total,  2654840k used, 13424204k free,   207208k buffers
    Swap:  8110076k total,        0k used,  8110076k free,  2021428k cached
    
      PID USER      PR  NI  VIRT  RES  SHR S  %CPU  %MEM    TIME+  COMMAND                                                     
     1677 mysql     20   0 2298m  59m 7376 S   0.3   0.4    82:05.45    mysqld  
    

    VIRT:当前进程使用的VM虚拟内存大小;
    %CPU: 当前进程占用的CPU百分比;
    %MEM: 当前进程占用的物理内存百分比;
    TIME+: 累计占用CPU时间,单位分钟,82分5.45秒;

    2.1查看线程

    查看整个进程

    $ top | grep orange
    10151 root      20   0 1644m 112m 1268 S 77.5  0.7  69:35.22 orange                                                    
    10151 root      20   0 1644m 114m 1268 S 49.2  0.7  69:36.70 orange                                                    
    10151 root      20   0 1644m 115m 1268 S 69.8  0.7  69:38.80 orange                                                    
    10151 root      20   0 1644m 123m 1268 S 63.5  0.8  69:40.71 orange                                                    
    

    查看各个线程

    $ top -H | grep orange
    10158 root      20   0 1644m 111m 1268 S 37.6  0.7  13:51.40 orange                                                    
    10169 root      20   0 1644m 111m 1268 S 31.7  0.7   9:23.18 orange                                                    
    10160 root      20   0 1644m 111m 1268 S 23.8  0.7   9:14.69 orange                                                    
    10173 root      20   0 1644m 111m 1268 S  2.0  0.7   6:39.96 orange                                                    
    10156 root      20   0 1644m 124m 1268 S 19.3  0.8  13:59.24 orange                                                    
    10160 root      20   0 1644m 124m 1268 S 15.0  0.8   9:15.14 orange                                                    
    10169 root      20   0 1644m 124m 1268 S 14.0  0.8   9:23.60 orange                                                    
    10158 root      20   0 1644m 124m 1268 S 12.6  0.8  13:51.78 orange                                                    
    10173 root      20   0 1644m 124m 1268 S  6.7  0.8   6:40.16 orange
    

    查看某个进程的线程

    $ top –H –p 20675 
    top - 21:49:06 up 79 days,  6:47,  7 users,  load average: 0.35, 0.39, 0.19
    Tasks:  23 total,   0 running,  23 sleeping,   0 stopped,   0 zombie
    Cpu(s):  5.5%us,  0.2%sy,  0.0%ni, 94.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
    Mem:  16079044k total, 15925868k used,   153176k free,   120784k buffers
    Swap:  8110076k total,        0k used,  8110076k free, 15093952k cached
    
      PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                     
    20693 root      20   0 1580m  84m 1288 S  9.3  0.5   0:07.96 cl_promotionTra                                             
    20692 root      20   0 1580m  84m 1288 S  7.0  0.5   0:09.03 cl_app_catalina                                             
    20686 root      20   0 1580m  84m 1288 S  5.7  0.5   0:15.61 cl_cartAction.l                                             
    20684 root      20   0 1580m  84m 1288 S  5.3  0.5   0:08.79 cl_shoppingActi                                             
    20681 root      20   0 1580m  84m 1288 S  5.0  0.5   0:16.67 cl_cartAction1.                                             
    20697 root      20   0 1580m  84m 1288 S  5.0  0.5   0:19.74 curl thread                                                 
    20688 root      20   0 1580m  84m 1288 S  4.3  0.5   0:08.15 cl_app_catalina                                             
    20694 root      20   0 1580m  84m 1288 S  2.7  0.5   0:08.88 cl_central1.log                                             
    20698 root      20   0 1580m  84m 1288 S  0.3  0.5   0:00.01 timeDataFunc                                                
    20675 root      20   0 1580m  84m 1288 S  0.0  0.5   0:00.00 orange                                                    
    20677 root      20   0 1580m  84m 1288 S  0.0  0.5   0:00.00 FileCheck                                                   
    20678 root      20   0 1580m  84m 1288 S  0.0  0.5   0:00.00 cl_promotionErr                                             
    20679 root      20   0 1580m  84m 1288 S  0.0  0.5   0:05.73 cl_shoppingBigL                                             
    20680 root      20   0 1580m  84m 1288 S  0.0  0.5   0:21.06 cl_pis-taskmgr2                                             
    20682 root      20   0 1580m  84m 1288 S  0.0  0.5   0:19.70 cl_pis-taskmgr1                                             
    20683 root      20   0 1580m  84m 1288 S  0.0  0.5   0:13.52 cl_checkoutMobi                                             
    20685 root      20   0 1580m  84m 1288 S  0.0  0.5   0:05.04 cl_shoppingBigL                                             
    20687 root      20   0 1580m  84m 1288 S  0.0  0.5   0:18.48 cl_checkoutLogg                                             
    20689 root      20   0 1580m  84m 1288 S  0.0  0.5   0:07.90 cl_central.log                                              
    20690 root      20   0 1580m  84m 1288 S  0.0  0.5   0:05.47 cl_shoppingBigL                                             
    20691 root      20   0 1580m  84m 1288 S  0.0  0.5   0:18.05 cl_shoppingBigL                                             
    20695 root      20   0 1580m  84m 1288 S  0.0  0.5   0:08.30 cl_pis-taskmgr.                                             
    20696 root      20   0 1580m  84m 1288 S  0.0  0.5   0:00.25 cl_agent.log  
    
  • 相关阅读:
    WPF DataGrid
    邮箱格式验证
    Spring Cloud微服务学习笔记
    你必须知道的MySQL知识点
    你必须掌握的分布式事务知识点
    重试操作下如何实现幂等?
    你必须掌握的关于JVM知识点
    RocketMQ开发者指南
    二分查找解题套路框架
    回溯算法解题套路框架
  • 原文地址:https://www.cnblogs.com/lanyangsh/p/10990962.html
Copyright © 2011-2022 走看看