Hi.
On 2024-02-22 (Do.) 02:47, Miles Hampson wrote:
Hi,
I have noticed that transferring large files with http/2 to a backend server
through HAProxy 2.9 (and earlier) over a network link with a bit of latency can
be extremely slow unless the HTTP/2 Flow Control window size is increased quite
a bit (i.e. 4x the default works well in our situation).
We are now trying out http/3 and hit the same issue. I don't think there is any
connection migration, this is just from a test server. There don't seem to be
any tune.h3 settings in the config manual, are there any connection settings
that I might be able to adjust to improve this situation?
I haven't investigated much so far because I don't have any understanding of how
QUIC stream flow control works yet, so the only thing I have tried is increasing
the QUIC receive buffer (this is on an Ubuntu 22.04 server)
Please be so kind and tell us which HAProxy version do you use.
haproxy -vv
Please be so kind and share the HAProxy config without sensible data.
Are you able to test the latest dev version?
Thanks for your time,
Miles
Regards
Alex
