Hi, is setting these sysctl's that high recommended? i don't really know what they mean, and honestly didn't search to see what they do, i simply tried to set them high in order to improve the service.
if its recommended, then i would test these changes if they will be done. Sami 2012/1/5 Gleb Smirnoff <gleb...@freebsd.org> > On Thu, Jan 05, 2012 at 03:43:45PM +0200, Sami Halabi wrote: > S> Hmm.. > S> > S> Somthing strange, i did: > S> net.graph.recvspace=8388608 > S> net.graph.maxdgram=8388608 > S> > S> > S> and i suddenly got disconnections and logs like: > S> Jan 5 16:10:01 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:11 mpd2 mpd: PPTP: NgMkSockNode: No buffer space available > S> > S> the mpd as follows: > S> > S> Jan 5 16:10:01 mpd2 mpd: Incoming L2TP packet from 172.25.229.3 1701 > S> Jan 5 16:10:01 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:01 mpd2 mpd: Incoming L2TP packet from 172.27.173.112 1701 > S> Jan 5 16:10:01 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:03 mpd2 mpd: Incoming L2TP packet from 172.19.246.206 1701 > S> Jan 5 16:10:03 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:06 mpd2 mpd: Incoming L2TP packet from 172.27.173.112 1701 > S> Jan 5 16:10:06 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Accepting PPTP connection > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: OPEN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Open event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: state change Initial --> Starting > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: LayerStart > S> Jan 5 16:10:11 mpd2 mpd: [L-14] PPTP: attaching to peer's outgoing call > S> Jan 5 16:10:11 mpd2 mpd: PPTP: NgMkSockNode: No buffer space available > S> Jan 5 16:10:11 mpd2 mpd: [L-14] PPTP call cancelled in state CONNECTING > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: DOWN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Close event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: state change Starting --> Initial > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: LayerFinish > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Down event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: SHUTDOWN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: Shutdown > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Accepting PPTP connection > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: OPEN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Open event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: state change Initial --> Starting > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: LayerStart > S> Jan 5 16:10:11 mpd2 mpd: [L-14] PPTP: attaching to peer's outgoing call > S> Jan 5 16:10:11 mpd2 mpd: PPTP: NgMkSockNode: No buffer space available > S> Jan 5 16:10:11 mpd2 mpd: [L-14] PPTP call cancelled in state CONNECTING > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: DOWN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Close event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: state change Starting --> Initial > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: LayerFinish > S> Jan 5 16:10:11 mpd2 mpd: [L-14] LCP: Down event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: SHUTDOWN event > S> Jan 5 16:10:11 mpd2 mpd: [L-14] Link: Shutdown > S> Jan 5 16:10:16 mpd2 mpd: Incoming L2TP packet from 172.27.173.112 1701 > S> Jan 5 16:10:16 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:21 mpd2 mpd: Incoming L2TP packet from 172.25.229.3 1701 > S> Jan 5 16:10:21 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> Jan 5 16:10:23 mpd2 mpd: Incoming L2TP packet from 172.19.246.206 1701 > S> Jan 5 16:10:23 mpd2 mpd: L2TP: ppp_l2tp_ctrl_create: No buffer space > S> available > S> > S> > S> Now i just returned to my original sysctl: > S> net.graph.recvspace=40960 > S> net.graph.maxdgram=40960 > S> > S> and everything seems fine > S> > S> any ideas? > > mpd has many open sockets, and each socket allocates that much recvspace > and sendspace. Since there are a lot of them, it hits per-user resource > limits, I suppose. > > We need to: > > 1) Change mpd to use one control socket with many hooks. > This also requires improving ng_socket, to have a fast hook lookup > method. > > 2) Implement SO_SNDBUF/SO_RCVBUF for AF_NETGRAPH socket, and utilize > it in ngctl, so there would be no need to bump global tunables. > > Eventually I may do this, but I need brave testers, since my mpd > installation is very small. > > -- > Totus tuus, Glebius. > -- Sami Halabi Information Systems Engineer NMS Projects Expert _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
