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One thing I'd be interested in, which kind of belongs in this space: In the last years, there were lots of performance reducing software patches for security f
by Traubenfuchs 2y ago
One thing I'd be interested in, which kind of belongs in this space:
In the last years, there were lots of performance reducing software patches for security flaws in CPUs, e.g. meltdown, specter and god knows what. Is there a way to disable those security fixes and increase performance, e.g. for servers that only ever run self written backend code and if so, is it common practice?
I feel like I wouldn't want those security fixes on that server I am running which only runs postgres, is only accessible to other servers via the postgres port and does nothing else.
- alecmg 2y agoPhoronix regularly tests this, search for keyword mitigations https://www.phoronix.com/review/amd-zen5-mitigations-off https://www.phoronix.com/review/amd-zen5-mitigations-off
- lnx01 2y agoI ran mitigations=off on my Zen4 until I saw that phoronix article and realised that in most workloads it made essentially no difference, and even harmed performance in others. I no longer run mitigations=off. But on my old i7 7700HQ mitigations=off improved performance by 10-20% depending on workload.