<p><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">背景：有时需要单看某个进程的CPU及占用情况，有时需要看整体进程的一个占用情况。</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">一、 linux ps命令，查看某进程cpu和内存占用率情况</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">[root@test vhost]# ps aux</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">解释：</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">linux 下的ps命令</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">USER 进程运行用户</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">PID 进程编号</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">%CPU 进程的cpu占用率</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">%MEM 进程的内存占用率</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">VSZ 进程所使用的虚存的大小</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">RSS 进程使用的驻留集大小或者是实际内存的大小</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">TTY 与进程关联的终端（tty）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">STAT 检查的状态：进程状态使用字符表示的，如R（running正在运行或准备运行）、S（sleeping睡眠）、I（idle空闲）、Z (僵死)、D（不可中断的睡眠，通常是I/O）、P（等待交换页）、W（换出,表示当前页面不在内存）、N（低优先级任务）T(terminate终止)、W has no resident pages</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">START （进程启动时间和日期）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">TIME ;（进程使用的总cpu时间）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">COMMAND （正在执行的命令行命令）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">NI (nice)优先级</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">PRI 进程优先级编号</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">PPID 父进程的进程ID（parent process id）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">SID 会话ID（session id）</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">WCHAN 进程正在睡眠的内核函数名称；该函数的名称是从/root/system.map文件中获得的。</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">FLAGS 与进程相关的数字标识</span></p><p><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">二、 linux ps命令，查看进程cpu和内存占用率排序</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">使用以下命令查看：</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">ps -aux | sort -k4,4n</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">ps auxw --sort=rss</span><br/><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">ps auxw --sort=%cpu</span></p><p><span style="font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);">来源：https://www.cnblogs.com/lidabo/p/5505610.html</span></p>
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