On Wed, 22 Jan 2025 at 11:07, Cedric Blancher <cedric.blancher@xxxxxxxxx> wrote: > > Good morning! > > IMO it might be good to increase RPCSVC_MAXPAYLOAD to at least 8M, > giving the NFSv4.1 session mechanism some headroom for negotiation. > For over a decade the default value is 1M (1*1024*1024u), which IMO > causes problems with anything faster than 2500baseT. The 1MB limit was defined when 10base5/10baseT was the norm, and 100baseT (100mbit) was "fast". Nowadays 1000baseT is the norm, 2500baseT is in premium *laptops*, and 10000baseT is fast. Just the 1MB limit is now in the way of EVERYTHING, including "large send offload" and other acceleration features. So my suggestion is to increase the buffer to 4MB by default (2*2MB hugepages on x86), and allow a tuneable to select up to 16MB. Ced -- Cedric Blancher <cedric.blancher@xxxxxxxxx> [https://plus.google.com/u/0/+CedricBlancher/] Institute Pasteur
