编译时:virtual memory exhausted: Cannot allocate memory(转)
2017-12-06 18:03
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一、问题
当安装虚拟机时系统时没有设置swap大小或设置内存太小,编译程序会出现virtual memory exhausted: Cannot allocate memory的问题,可以用swap扩展内存的方法。二、解决方法
在执行free -m的是时候提示Cannot allocate memory:(swap文件可以放在自己喜欢的位置如/var/swap)
1 [root@Byrd byrd]# free -m 2 total used free shared buffers cached 3 Mem: 512 108 403 0 0 28 4 -/+ buffers/cache: 79 432 5 Swap: 0 0 0 6 [root@Byrd ~]# mkdir /opt/images/ 7 [root@Byrd ~]# rm -rf /opt/images/swap 8 [root@Byrd ~]# dd if=/dev/zero of=/opt/images/swap bs=1024 count=2048000 9 2048000+0 records in 10 2048000+0 records out 11 2097152000 bytes (2.1 GB) copied, 82.7509 s, 25.3 MB/s 12 [root@Byrd ~]# mkswap /opt/images/swap 13 mkswap: /opt/images/swap: warning: don't erase bootbits sectors 14 on whole disk. Use -f to force. 15 Setting up swapspace version 1, size = 2047996 KiB 16 no label, UUID=59daeabb-d0c5-46b6-bf52-465e6b05eb0b 17 [root@hz mnt]# swapon /opt/images/swap 18 [root@hz mnt]# free -m 19 total used free shared buffers cached 20 Mem: 488 481 7 0 6 417 21 -/+ buffers/cache: 57 431 22 Swap: 999 0 999
内存太小,增加内存可以解决。
使用完毕后可以关掉swap:
[root@hz mnt]# swapoff swap [root@hz mnt]# rm -f /opt/images/swap
swap文件也可以不删除,留着以后使用,关键是你的虚拟机硬盘够用。
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