云主机内存不够的解决办法

最新推荐文章于 2022-01-15 20:44:38 发布

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最新推荐文章于 2022-01-15 20:44:38 发布

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分类专栏： docker

本文链接：https://blog.csdn.net/bloestone/article/details/87741474

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购买了一个1G内存云主机，装了docker，发现在里面执行make报如下错误，怀疑是内存不够所致，几乎把所有程序都停了，编译还是报一样的错误，于是打算加点内存，发现加1G内存至少需要1K多的money，太贵了。

c++: fatal error: Killed signal terminated program cc1plus

于是想是否可以增加虚拟内存，在网上找了增加虚拟内存的方法，试了还真的ok。

top - 23:09:20 up 77 days, 12:45,  3 users,  load average: 2.74, 4.44, 2.94
Tasks: 104 total,   1 running,  90 sleeping,  13 stopped,   0 zombie
%Cpu(s):  3.3 us,  3.7 sy,  0.0 ni,  0.0 id, 93.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  1016516 total,    75984 free,   875676 used,    64856 buff/cache
KiB Swap:  2047996 total,  1068336 free,   979660 used.    27880 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND                                                           
27620 root      20   0 1407044 770932    556 D  6.0 75.8   0:27.00 cc1plus                                                           
27743 root      20   0  756312   7288   1308 S  0.7  0.7   0:01.11 barad_agent                                                       
   25 root      20   0       0      0      0 S  0.3  0.0   1:12.64 kswapd0                                                           
    1 root      20   0  191032   1688   1060 S  0.0  0.2   5:38.47 systemd                                                           
    2 root      20   0       0      0      0 S  0.0  0.0   0:00.11 kthreadd                                                          
    3 root      20   0       0      0      0 S  0.0  0.0   1:18.39 ksoftirqd/0                                                       
    5 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/

操作步骤如下：

[root@VM_0_5_centos var]# dd if=/dev/zero of=/var/swap bs=1024 count=2048000
2048000+0 records in
2048000+0 records out
2097152000 bytes (2.1 GB) copied, 24.6811 s, 85.0 MB/s
[root@VM_0_5_centos var]# mkswap /var/swap
Setting up swapspace version 1, size = 2047996 KiB
no label, UUID=cce4d9e5-8b2b-4ac3-8256-68b5611c5c7e
[root@VM_0_5_centos var]# mkswap -f /var/swap
mkswap: /var/swap: warning: wiping old swap signature.
Setting up swapspace version 1, size = 2047996 KiB
no label, UUID=f70bfb56-c582-4515-a912-e23b5c9f3b40
[root@VM_0_5_centos var]# swapon /var/swap
swapon: /var/swap: insecure permissions 0644, 0600 suggested.
[root@VM_0_5_centos var]# free
              total        used        free      shared  buff/cache   available
Mem:        1016516      198496       76060         780      741960      650356
Swap:       2047996           0     2047996
[root@VM_0_5_centos var]#

虚拟内存取消办法：

[root@VM_0_5_centos var]# swapoff /var/swap
[root@VM_0_5_centos var]# free
              total        used        free      shared  buff/cache   available
Mem:        1016516      196760      190860         780      628896      659524
Swap:             0           0           0