GNet Solutions » FreeBSD Administration

I recently set up a headless transmission bittorrent client and found the following error in the /var/log/messages file:

UDP failed to set receive buffer: No buffer space available (tr-udp.c:58)
UDP failed to set receive buffer: requested 4194304, got 42080 (tr-udp.c77)

As it turns out, the UDP buffer for FreeBSD is set to a lower value than required by Transmission. To fix this, set a sysctl to increase the UDP buffer size.

• Edit the sysctl config file:
  

  vi /etc/sysctl.conf
  

  • And add the following to the bottom of the file:
    

    kern.ipc.maxsockbuf=5242880
    net.inet.udp.recvspace=4194304
    

Resources¶

• https://forums.freenas.org/index.php?threads/transmission-error-udp-failed-to-set-receive-buffer-please-help.15203/
• https://bbs.archlinux.org/viewtopic.php?id=170628