3 ms·
In general the linux kernel seems extremely badly behaved under ram pressure, see how it reacts to swapping.
by throwaway2048 4y ago
In general the linux kernel seems extremely badly behaved under ram pressure, see how it reacts to swapping.
- alyandon 4y agoIt wasn't even actual ram pressure - there was ~500 GB of unused ram but something like 800 GB or so of negative cache dentries. So, it was over some threshold that the kernel decided it was time to start reclaiming all those entries and locked up the entire server while it was doing so. Madness.