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Question

swap not used though memory full

Posted January 21, 2021 109

CentOS Server Optimization

Hello,

I found on Centos7, memory utilization is above 90% still swap is 0 mb in use.

[xxx@z ~]$ free -m
              total        used        free      shared  buff/cache   available
Mem:           7682        1457         151         155        6073        5772
Swap:          7935           0        7935

By:

wagh1ravi

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1 answer

bobbyiliev January 21, 2021

Hi there,

The important measure is the available which in your case is 5772MB. So nearly 75% of your memory is available.

Only if your available memory is full, only then the system will start writing to the swap.

Also very important side note, I would really not advisable having such a huge swap file, as if the system starts storing so much information in swap it could really slow things down.

Regards,
Bobby

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