Hi, On 2017-01-05 12:55:44 -0600, Jonathon Nelson wrote: > Attached please find a patch for PostgreSQL 9.4 which changes the maximum > amount of data that the wal sender will send at any point in time from the > hard-coded value of 128KiB to a user-controllable value up to 16MiB. It has > been primarily tested under 9.4 but there has been some testing with 9.5. > > In our lab environment and with a 16MiB setting, we saw substantially > better network utilization (almost 2x!), primarily over high bandwidth > delay product links.
That's a bit odd - shouldn't the OS network stack take care of this in both cases? I mean either is too big for TCP packets (including jumbo frames). What type of OS and network is involved here? Greetings, Andres Freund -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers