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Memory values are wrong

Modified on 2025-06-10 15:46:00 +0200

Hello

I'm using the SNMP Memory sensor to monitor the free memory on CentOS 7 servers. The results are totally wrong.

The command "free -h" displays this:

total used free shared buff/cache available Mem: 3.6G 1.4G 984M 36M 1.2G 1.9G Swap: 0B 0B 0B

PRTG Shows me 61% free. So the sensor might measure something wrong. What can i do to fix this?

Thanks!

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Hi there,

Thank you for your post.

The sensor only considers real free memory as free while not taking in account cached and buffered memory.

Please check out this other Knowledge Base post for an alternative.

I hope this helps.

Kind regards,
Andreas Günther
Tech Support, Paessler AG

support@paessler.com

Mar, 2020 - Permalink

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Memory values are wrong

Article CommentsAttention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

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Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.