用什么指令看服务器内存
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在服务器管理中,了解内存使用情况是非常重要的,内存不足可能导致应用程序运行缓慢甚至崩溃,因此掌握查看内存的方法可以帮助你更好地管理服务器资源。
使用free -h
查看内存使用情况
free -h
是一个简单常用的命令,可以快速显示磁盘使用情况,包括内存。
-
命令:
free -h
-
作用:显示磁盘空间使用情况,包括已用、可用和总空间,以及swap空间使用情况,内存会被包含在已用空间中。
-
示例输出:
total used free available use% Mounted on 1000000 800000 200000 100 /data 500000 400000 100000 80% swap
total
:总空间used
:已用空间free
:可用空间available
:swap空间可用use%
:已用空间占总空间百分比Mounted on
:磁盘挂载点
-
说明:
free -h
会显示磁盘使用情况,包括内存,你可以通过查看free
命令的百分比来了解内存的使用情况。
使用top
实时查看内存使用情况
top
是一个强大的实时监控工具,可以显示系统资源使用情况,包括内存。
- 命令:
top
- 作用:实时显示系统资源使用情况,包括CPU、内存、磁盘、网络等,内存使用情况会显示在第一行。
- 示例输出:
tasks total free used avail %rose idle: 2000.0 KiB, 1000.0 KiB free, 1000.0 KiB used (100%) swap: 5000.0 KiB, 4000.0 KiB free, 1000.0 KiB used (20%) [ kernel: 1000.0 KiB, 500.0 KiB free, 500.0 KiB used (100%) ] [ user: 800.0 KiB, 400.0 KiB free, 400.0 KiB used (100%) ] [ nice: 200.0 KiB, 100.0 KiB free, 100.0 KiB used (100%) ] [ i/o: 300.0 KiB, 200.0 KiB free, 100.0 KiB used (100%) ] [ sys: 50.0 KiB, 25.0 KiB free, 25.0 KiB used (100%) ] [ m/n: 10.0 KiB, 5.0 KiB free, 5.0 KiB used (100%) ] [ p: 5.0 KiB, 2.5 KiB free, 2.5 KiB used (100%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ d: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ w: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ s: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ h: 0.0 KiB, 0.0 KiB free, 0.0 KiB used (0%) ] [ p: 0.0 KiB, 0.0 KiB free,
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