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Red Hat Enterprise Linux Troubleshooting Guide by Benjamin Cane

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Investigating the filesystem being full

Earlier, we noticed that the filesystem was 100 percent full. Unfortunately, the version of sysstat we have installed doesn't capture disk space usage. A useful thing to identify is when the filesystem filled up as compared to when our run queue started to increase:

Jul  5 01:48:01 localhost auditd[560]: Audit daemon is low on disk space for logging
Jul  5 01:48:01 localhost auditd[560]: Audit daemon is suspending logging due to low disk space.

From the log messages we saw earlier, we could see the auditd process identified the low disk space at 01:48. This is extremely close to the time our run queue spike was seen.

This is building towards a hypothesis that the problem's root cause was a filesystem filling ...

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