How to increase the swap partition under Linux

1, check the current partition situation (using FREE-M or cat/proc/swaps):

[Root@db2 root]# Free-m

Total used free shared buffers Cached

MEM:1006 84 922 0 11 38

-/+ buffers/cache:35 971

swap:0 0 0

2, increase the exchange of partition files and size:

Check for no swap, the following need to be added:

Determines the size of the new interchange file, multiplying the size by the size of the 1024来 decision block. For example, the block size of a 64MB swap file is 65536, and the following command is typed as root at the shell prompt, where count equals the desired block size.

[ROOT@DB2 root]# dd If=/dev/zero of=/home/swap bs=1024 count=1024000

1024000+0 Records in

1024000+0 Records out

[Root@db2 root]#

Use the following command to set up the swap file:

[Root@db2 root]# Mkswap/home/swap

Setting up Swapspace version 1, size = 1023996 KiB

3. Enable swap partition files:

To enable swap files now instead of automatically booting at boot time, use the following command:

[Root@db2 root]# Swapon/home/swap

Check for increased exchange:

[Root@db2 root]# Free-m

Total used free shared buffers Cached

mem:1006 994 12 0 4 929

-/+ buffers/cache:60 946

swap:999 0 999

To enable at boot time, edit the/etc/fstab file to include the following line (/home/swap swap defaults 0 0):

[Root@db2 root]# Vi/etc/fstab

This article URL address: http://www.bianceng.cn/OS/Linux/201410/45429.htm

label=//ext3 Defaults 1 1

Label=/boot/boot ext2 Defaults 1 2

None/dev/pts devpts gid=5,mode=620 0 0

NONE/PROC proc Defaults 0 0

NONE/DEV/SHM TMPFS Defaults 0 0

LABEL=/USR/USR ext3 Defaults 1 2

/dev/sda5 Swap Defaults 0 0

/dev/cdrom/mnt/cdrom iso9660 Noauto,owner,kudzu,ro 0 0

/dev/fd0/mnt/floppy Auto Noauto,owner,kudzu 0 0

/home/swap Swap Defaults 0 0

The next time the system boots, it will enable the new swap file

Check the added case again:

[Root@db2 oracledb]# Free-m

Total used free shared buffers Cached

1, check the current partition situation (using FREE-M or cat/proc/swaps):

[Root@db2 root]# Free-m

Total used free shared buffers Cached

MEM:1006 84 922 0 11 38

-/+ buffers/cache:35 971

swap:0 0 0

2, increase the exchange of partition files and size:

Check for no swap, the following need to be added:

Determines the size of the new interchange file, multiplying the size by the size of the 1024来 decision block. For example, the block size of a 64MB swap file is 65536, and the following command is typed as root at the shell prompt, where count equals the desired block size.