On 09/25/2012 02:42 AM, Graeme Fowler wrote: > On Sun, 2012-09-23 at 02:51 -0600, Pete Ashdown wrote: >> Thanks for the localhost addressing tip. I've got my lvs dns in production >> now and it is cranking along. I had to lower the udp timeout to 1 second >> from my predicted 15 because the latter was crashing the server with OOM. > Really? How many queries/sec is your system handling?
1000-2000 qps. >> Even with 1 second timeout, the InActConn are piling up (it hovers around >> 300): >> >> Prot LocalAddress:Port Scheduler Flags >> -> RemoteAddress:Port Forward Weight ActiveConn InActConn >> UDP cns1.domain.com:domain wlc >> -> localhost:domain Route 12 0 282 >> -> rec3.domain.com:domain Route 4 0 84 >> >> I don't understand why lvs is tracking these connections, because I presume >> with UDP they don't flow back through. Is there a trigger to have it just >> "fire and forget" UDP after it is released to the real-IP? > Those numbers are small enough to be practically insignificant. You're > right though, in DR mode there's no record of an active connection as > the three-way-handshake (for TCP connections) doesn't traverse the > director; for UDP in any mode there's no concept of state so the only > "connection" the director ever sees is "inactive" (that is, a packet was > routed). > > I'm troubled by the OOM though. That would, for most modern systems, > imply something is in error in the ipvs code - unless you're running on > a system with a relatively small amount of RAM. > 8GB of RAM. _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
