Hi Steve, increasing the buffer size did indeed enhance throughput.
I am obviously not an expert in this field, but i don't understand why or if the TCP Receive Window Size shouldn't increase automatically. I found this thread on the ML and i'm reading myself a bit more into the topic right now. https://lists.freebsd.org/pipermail/freebsd-net/2014-August/039495.html Thank you for your tip, however.. Sydney > On 16 Feb 2017, at 16:35, Steven Hartland <kill...@multiplay.co.uk> wrote: > > Window scaling and receive buffer scaling is the most likely cause. > > Check what the sysctl net.inet.tcp.recvspace is set to, then try increasing > it e.g. > sysctl net.inet.tcp.recvspace=655360 > > This jumped the transfer rate with a wget and your test URL from 3MB/s to > 30MB/s here. > > Regards > Steve > > On 16/02/2017 14:34, Sydney Meyer via freebsd-net wrote: >> Hello, >> >> I'm seeing continuous slow download speeds from Amazon S3, but only on >> FreeBSD. Other OSes saturate the connection without problems. >> >> This happens with 10.3-RELEASE and 11.0-RELEASE and only with AWS S3 in >> different regions (Ireland, London, Frankfurt, US Standard have been tested) >> whilst using fetch, curl, et. al. >> >> I have tested this on multiple machines, bare metal, bhyve, Xen and VMware >> VMs, routed setups and direct pppoe links.. all the same. >> >> Anyone seeing similar issues? >> >> Here's a url to try: >> >> http://s3.eu-central-1.amazonaws.com/4f48caf1d8bcbef8/c5b38f8b3625d2b6/zerofile.raw >> >> Also, when doing double NAT, i.e. VMware Fusion FreeBSD Guest with "Share >> with my Mac"-Interface, the machine is doing completely fine, as in >> saturates the link, 90Mbps otherwise between 12-15Mbps.. >> >> I also switched the FreeBSD Routers with Linux-based ones and with the >> isp-provided router box, with the same result. >> >> I have launched VMs with Digital Ocean to "rule out" my ISP and there seems >> to be the same issue. Downloading from S3 is multiple times slower than any >> other connection to services outside of S3 or on any other OS. >> >> It seems like other people are seeing the same issue: >> >> https://forums.freebsd.org/threads/59756/#post-343064 >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
