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If you are using VPS with very limited memory resources, the link provides excellent reference material on troubleshooting memory issues with some of the know applications that can possibly consume high memory.
If you are using VPS with very limited memory resources, the link provides excellent reference material on troubleshooting memory issues with some of the know applications that can possibly consume high memory.
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Below, will add up the values in the fourth column (%MEM) and give a total of percentage memory used.
ps aux | awk '{x=x+$4}END {print x}'