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...Thu, 10 Aug 2023, Cedric Blancher wrote: >We're experiencing rather very bad latency spikes on busy Linux >systems, for example if one machine is the jumphost (ssh -J) for a few >hundred connections, while at the same time handles CPU intensive >tasks. > >Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. Did you already check the old and tried method of nice(2)? If the other load is CPU-intensive, this is usually sufficient. Normally you?d nice the CPU-intensive load (so anything else on the system is not affected), but you can also negative-nice the s...

Good morning! We're experiencing rather very bad latency spikes on busy Linux systems, for example if one machine is the jumphost (ssh -J) for a few hundred connections, while at the same time handles CPU intensive tasks. Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. put all ssh processes into the SCHED_FIXED scheduling class, with a priority higher than the non-interactive compute processes? Also, do I interpret it correctly that each forwarded TCP connection has its own process?! Ced -- Cedric Blancher <cedric...

Dear list, This weeks RCW has a slightly different format than before. After all, since what we want is less bloat, this RCW is less verbose. Please do let me know what you think off-list. *Interesting stuff on the Rails Timeline* _Fixed and commited to trunk:_ An issue with not null columns in SQLite3 migrations(<a href="http://dev.rubyonrails.org/ticket/5215">#4419</a>) by Greg Lappen''s patch <a href="http://dev.rubyonrails.org/ticket/5215">5215</a> _Cool Enhancements (not co...