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This article introduces how to build a swap file in Centos 7 to increase virtual memory, the content is very detailed, interested friends can refer to, hope to be helpful to you.

1. First, you need to create a swapfile, as follows:

[root@ip-172-31-29-22 etc] # dd if=/dev/zero of=/tmp/newdisk bs=1M count=1024

1024000 records in

1024000 records out

1073741824 bytes (1.1 GB) copied, 13.307 s, 80.7 MB/s

two。 Format the file to swap format

[root@ip-172-31-29-22 etc] # mkswap-f / tmp/newdisk

Setting up swapspace version 1, size = 1048572 KiB

No label, UUID=9bb4d98c-705f-40ff-9fd0-fe9de5733b44

3. Mounting use

[root@ip-172-31-29-22 etc] # swapon / tmp/newdisk

Swapon: / tmp/newdisk: insecure permissions 0644, 0600 suggested.

4. Although it is indicated that it is not safe, it is actually mounted.

[root@ip-172-31-29-22 etc] # free-m

Total used free shared buff/cache available

Mem: 990 130 64 56 795 608

Swap: 1023 0 1023

On how to create a swap file in Centos 7 to increase virtual memory to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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