On Tue, 27 Feb 2024 15:08:18 -0800 (PST) Lameter, Christopher wrote: > > This looks good, do you have any performance numbers to share ? > > > > On a host with 384 threads, 384*16 -> 6 GB of memory. > > Those things also come with corresponding memories of a couple of TB... We have a lot of machines at Meta with more cores than gigabytes of memory. Keying on amount of memory would make sense. Something like max(1MB, sk_mem / cores / 8) comes to mind? In fact it may be a better idea to have the sysctl control the divisor (the 8 in my example above). I had issues in the past with people "micro-optimizing" the absolute size, forgetting about it, moving workload to a larger machine and then complaining TCP is choking :(
