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Linux VM unresponsive

Unix & Linux Asked by Ykaly on December 16, 2020

I have a Linux VM that became unresponsive in console. I knew it because ssh hangs and ping says no route to host.

I am not asking for the specific reason but what could have possibly caused this out of the various things it could be. Kdump is configured but it didn’t trigger (no GUI). Logging completely stopped during a certain time so /var/log/* does not give much information. Sar says memory and swap usage is high before logging stopped but it is a consistent usage of 90%+/40%+ for consecutive days. So I am doubting if its the cause. OOM killer didn’t trigger I believe because there is still swap space available.

Linux VM running in VMware with guest OS of SLES 15 SP1.

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