48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
---
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title: Ubuntu设置swap分区
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createTime: 2022/11/02 16:22:28
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tags:
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- Ubuntu
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categories:
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- 随记
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---
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**通常，Ubuntu Server 安装完成后已经自动配置了 swap 分区，使用`sudo swapon --show`或者`free -m`查看**
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```bash
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# 建立swapfile
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sudo fallocate -l 4G /swap.img
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# 设置权限
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sudo chmod 600 /swap.img
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# 配置分区生效
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sudo mkswap /swap.img
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sudo swapon /swap.img
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# sudo cp /etc/fstab /etc/fstab.bak
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echo '/swap.img none swap sw 0 0' | sudo tee -a /etc/fstab
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# 查看分区生效情况
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# sudo swapon --show
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# free -m
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```
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分区大小参考：
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| RAM(GB) | No hibernation | With Hibernation | Maximum |
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| ------- | -------------- | ---------------- | ------- |
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| 1 | 1 | 2 | 2 |
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| 2 | 1 | 3 | 4 |
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| 3 | 2 | 5 | 6 |
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| 4 | 2 | 6 | 8 |
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| 5 | 2 | 7 | 10 |
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| 6 | 2 | 8 | 12 |
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| 8 | 3 | 11 | 16 |
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| 12 | 3 | 15 | 24 |
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| 16 | 4 | 20 | 32 |
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| 24 | 5 | 29 | 48 |
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| 32 | 6 | 38 | 64 |
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| 64 | 8 | 72 | 128 |
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| 128 | 11 | 139 | 256 |
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| 256 | 256 | 512 | 512 |
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| 512 | 512 | 1024 | 1024 |
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| 1024 | 1024 | 2048 | 2048 |
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