What information do I need to investigate in case of high load, I/O or memory consumption in RHEL?
Issue
- Sometimes server does not respond to commands.
- Notice high CPU or i/o consume
- Notice low memory free or high swap usage
- Kernel Panic (by oom-killer)
- What data should be collected if system is hung
or observing performance issue?
Environment
- Red Hat Enterprise Linux(RHEL) 4/5/6
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