Hi, On 2025-02-11 19:52:34 +0100, Jelte Fennema-Nio wrote: > So this starts bumping postmaster and pgbench its soft open file limit > to the hard open file limit.
Not sure that's quite the right thing to do for postmaster. What I'd start with is to increase the soft limit to "already used files" + max_files_per_process. That way we still limit "resource" usage, but react better to already used FDs. If io_uring, listen_addresses, whatnot use FDs max_files_per_process would be added ontop. Then we can separately discuss increasing max_files_per_process more aggressively. I don't see a downside to just increasing the soft limit for pgbench. It avoids the stupid cycle of getting "need at least %d open files, but system limit is %ld", increase ulimit, retry, without any non-theoretical downsides. > Doing so is especially useful for the AIO work that Andres is doing, because > io_uring consumes a lot of file descriptors. Yep. One more reason this is a good idea is that we'll also need this for threading, since there all client connections obviously will eat into the "normal file descriptor" budget. Greetings, Andres Freund
