Swap memory full

[retechpro]

Hi All,
my swap memory is reached to 99%.
Swap Size is 4gb which has been reached.

my server specs is 16 core with 128gb ram.
Currently half of the Ram is free.

Is it good to increase the swap memory? Or i can refresh the existing memory.


anyone can help.

 

[cPRex]

Hey there! It really depends on the resources being used on the system. It would be best to evaluate what is causing so much swap to be used, and then you would be able to decide if increasing it will help the situation, or just lead to a bigger swap area getting full again.

If you are only using 50% of your RAM, is seems odd to me that swap would be completely full already.

Since this area isn't controlled by cPanel, you may need to reach out to your host to confirm the hardware is working properly on the system.

 

[retechpro]

Hey there! It really depends on the resources being used on the system. It would be best to evaluate what is causing so much swap to be used, and then you would be able to decide if increasing it will help the situation, or just lead to a bigger swap area getting full again.

If you are only using 50% of your RAM, is seems odd to me that swap would be completely full already.

Since this area isn't controlled by cPanel, you may need to reach out to your host to confirm the hardware is working properly on the system.

How can i verify why limit has been reached. Also how can i decrease now as it has been full.

which thing i need to verify to my server provider related to hardware.

 

[quietFinn]

Linux systems usually use swap before the RAM memory is full.
This will tell what is the swappiness parameter:
cat /proc/sys/vm/swappiness

 

[retechpro]

Linux systems usually use swap before the RAM memory is full.
This will tell what is the swappiness parameter:
cat /proc/sys/vm/swappiness

my ram always free 50%.

output of the command is : 10

what can i do now.

 

[quietFinn]

swappiness value 10 means that swap will be used when RAM is 90% full.
That would indicate that in some point more than 90% of memory has been used.
I found instructions how to clear swap:

How to clear swap memory in Linux

Got swappiness? Learn how to set appropriate swap settings in Linux, and clear your swap's contents.

www.redhat.com

If swap usage is constantly high (and swap is big enough) it doesn't really help to increase size of swap, but you should add ram.
But then again, 128GB is quite a lot, so maybe you should try to find out what (and when) is using all your memory.

 

[cPRex]

We have some more details about dealing with swap here:

My server is continuously using large amounts of swap space

Symptoms When using the free -h command, you notice that your server is always using a large amount of swap space: # free -htotal used free shared buff/cache availableMem: 7.6G 894M 4.2G 361M 2.6G ...

support.cpanel.net

 

[retechpro]

Already checked this post. I restart the server and it goes to 0. I’m monitoring now if it happen again then will update you. Thank you

 

[PeteS]

We have some more details about dealing with swap here:

My server is continuously using large amounts of swap space

Symptoms When using the free -h command, you notice that your server is always using a large amount of swap space: # free -htotal used free shared buff/cache availableMem: 7.6G 894M 4.2G 361M 2.6G ...

support.cpanel.net

FYI, this article needs to be updated to add the -a options for swapoff / swapon.

 

[retechpro]

I’m facing the issue again and again as my ram always free 50%. I did not found the reason behind it yet.

 

[cPRex]

@retechpro - did you check the article I posted a few responses up?

@PeteS - done!