Linux Extended Swap partition

Swap partition Management

First, view the current swap partition

[Email protected] ~]# free-m

Total used free shared buffers Cached

mem:1841 519 1322 16 0 213

-/+ buffers/cache:304 1536

swap:0 0 0

[Email protected] ~]# swapon-s

Second, increase the swap partition

can be a partition, LVM,File

= = = Partition = = =

1. Preparing Partitions

[[email protected] ~]# Fdisk/dev/vdb (t conversion partition ID 82)

[Email protected] ~]# PARTPROBE/DEV/VDB

[Email protected] ~]# ll/dev/vdb*

BRW-RW----. 1 root disk 253, 6 10:18/dev/vdb

BRW-RW----. 1 root disk 253, 6 10:18/dev/vdb1

2. Initialize

[Email protected] ~]# MKSWAP/DEV/VDB1

3. Mounting

[Email protected] ~]# BLKID/DEV/VDB1

/dev/vdb1:uuid= "ea5b1c77-e540-463c-9644-0d75450f8b4c" type= "swap"

[Email protected] ~]# Vim/etc/fstab

Uuid= "ea5b1c77-e540-463c-9644-0d75450f8b4c" swap swap default 0 0

[[email protected] ~]# swapon-a ( read /etc/fstab)

[Email protected] ~]# swapon-s

Filename Type Size used priority

/DEV/VDB1 Partition 524284 0-1

===file===

[Email protected] ~]# df-th

Filesystem Type Size used Avail use% mounted on

/DEV/VDA1 xfs 10G 3.3G 6.8G 33%/

[[email protected] ~]# dd If=/dev/zero of=/swap2.img bs=1m count=512

Or

[[email protected] ~]# dd </dev/zero >/swap2.img bs=1m count=512

[Email protected] ~]# mkswap/swap2.img

[Email protected] ~]# Vim/etc/fstab

/swap2.img Swap swap default 0 0

[Email protected] ~]# swapon-a

Swapon:/swap2.img:insecure permissions 0644, 0600 suggested.

[Email protected] ~]# chmod 600/swap2.img

[Email protected] ~]# swapon-a

[Email protected] ~]# swapon-s

Filename Type Size used priority

/DEV/VDB1 Partition 524284 0-1

/swap2.img file 524284 0-2

Third, the exchange of sub-tune excellent

Multiple swap partitions are distributed across different disks

When mounted, use the same priority level

[Email protected] ~]# Vim/etc/fstab

Uuid= "ea5b1c77-e540-463c-9644-0d75450f8b4c" swap swap default,pri=1 0 0

Uuid= "Ea5b1c77-e540-465c-9644-0d75457f8b45" swap swap default,pri=1 0 0

[Email protected] ~]# swapoff-a

[Email protected] ~]# swapon-s

[Email protected] ~]# swapon-a

[Email protected] ~]# swapon-s

Filename Type Size used priority

/DEV/SDB1 Partition 524284 0 1

/DEV/SDC1 Partition 524284 0 1

This article is from the "technical Discrimination" blog, please be sure to keep this source http://emg2012.blog.51cto.com/3705315/1613301

Linux Extended Swap partition