Hi, On 2024-04-10 07:55:16 -0700, Parag Paul wrote: > This is a little bit more complex than that. The spinlocks are taken in the > LWLock(Mutex) code, when the lock is not available right away. > The spinlock is taken to attach the current backend to the wait list of the > LWLock. This means, that this cannot be controlled. > The repro when it happens, it affects any mutex or LWLock code path, since > the low hamming index can cause problems by removing fairness from the > system.
Please provide a profile of a problematic workload. I'm fairly suspicious of the claim that RNG unfairness is a real part of the problem here. Greetings, Andres Freund
