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
