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Linux filesystem percent used shown incorrectly

smcguire6177 over 10 years ago

Good morning,

I've been running into an issue where alerts we have are not triggering for filesystems that have reached 100% utilization on Linux hosts. From what little I've found I'm seeing that Orion is using the Linux net-snmp MIBS for "total space / used space" which does not account for things like the ext3 reserve block count. I happened upon this post http://thwack.solarwinds.com/message/80692#80692 , but it does not appear to address the issue I'm seeing with testing. Is there anything that can be configured or changed to allow for Orion to report on percent used or account for the reserve space?

More information:

tune2fs -l /dev/mapper/vg_oratemp-u06_SdHv | grep -i "reserved block"

Reserved block count: 524156

df -hP /u06 Filesystem

Size Used Avail Use% Mounted on

/dev/mapper/vg_oratemp-u06_SdHv 40G 38G 0 100% /u06

df -P /u06 Filesystem

1024-blocks Used Available Capacity Mounted on

/dev/mapper/vg_oratemp-u06_SdHv 41284928 39193176 0 100% /u06

In Orion: /u06 39.4 GB 37.4 GB 95 %

Top Replies

0 rob.hock over 10 years ago

This is unfortunately a limitation of net-snmp. There is a possibility to use a SAM template and apply a calculation as referenced here: http://thwack.solarwinds.com/message/178281#178281
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0 ecklerwr1 over 10 years ago

Or maybe simpler for those linux hosts I would lower the alert warning and critical by 5% to accommodate the lack of net-snmp agent providing for the reserve. That's how I would work around it if your hosts usually show around 5% difference with the reserve in place being taken from the disk. This would work in NPM and not require a bunch of workarounds... just set the alerts to fire sooner.
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0 clovisx over 9 years ago

Hello smcguire6177,
im also confused by this setting It seems like it's quite limited for Orion monitoring Linux Box. Do you have a solution for this now ? Could you please share me know?
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0 aLTeReGo over 8 years ago
SAM 6.3 Beta 2 is now available which includes a Linux Agent for Node, Volume, Interface, and Application monitoring. This agent should address many of the shortcomings associated with monitoring Linux host via SNMP, up to and including properly calculating volume usage statistics referenced in this thread. If you already own Server & Application Monitor and are under active maintenance, you can sign-up to participate in the beta at the link below.
https://thwack.solarwinds.com/thwack-beta.jspa?groupID=1003 https://www.surveymonkey.com/r/SAM63
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0 ecklerwr1 over 8 years ago in reply to aLTeReGo

Woohoo linux agent!
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