Learn how to manually expand the SWaP partition size

In Linux, this virtual memory is called SWaP. When installing the operating system, the installation wizard prompts you how much SWaP space you need to create. When we install Oracle 10 Gb in Linux, we find that the SWaP partition is too small, and we need to manually expand the size of the SWaP partition. Here, we will learn how to expand SWaP partitions.

1. Create a partition

The following operations must be performed under the root user. First, create a partition and run the dd command, such

 
 

  
  
dd if=/dev/zero of=/home/swap bs=1024 count=1024000 
 
 

This will create a partition file such as/home/swap. The file size is 1024000 blocks. Generally, 1 block is 1 K, so the space is 1024 MB.

2. Specify the partition type as SWaP partition.

Convert the partition into a SWaP partition. Run the mkSWaP command as follows:

 
 

  
  
/sbin/mkswap /home/swap 
 
 

Then use the SWaP partition to make it valid.

 
 

  
  
/sbin/swapon /home/swap 
 
 

Now, run the free-m command to check the memory and SWaP partition size, and we can see that the space is increased by MB.

3. Set the extended SWaP partition to auto mount

However, after the computer is restarted, it is found that SWaP is still so large, the new SWaP is not automatically started, and manual start is required.

Modify the/etc/fstab file and add the following line to automatically mount the command line:

 
 

  
  
/home/swap swap swap defaults 0 0 
 
 

In this way, we have extended the SWaP partition. Hope everyone can learn.