On 2010-05-12 13:47, Seventh Sven wrote: > On 2010-05-12 10:53, Siim Põder wrote: >> Tomasz Chmielewski wrote: >>> I have "IPVS: ip_vs_send_async error" literally flooding in dmesg. > > Jumping in with the same problem here. I see the same error on an > ipvs sync master in a high-volume LVS-DR setup here. > >> Can you check with tcpdump if there are connection sync packets >> being sent on the wire and how often/how long they are (host >> 224.0.0.81 and udp port 8848)? > > There are around 100 sync packets sent on every update (every > second), and they are all 1420 bytes (except the last one, which > varies). Each bulk is sent within a sub-millisecond window.
Turns out that this is fixed as described by Siim previously in http://lists.graemef.net/pipermail/lvs-users/2009-December/022805.html What I forgot was to restart the sync daemon process. Existing sockets won't be affected by the increased sysctl value. So: net.core.wmem_max = 16777216 # Or tune to your needs net.core.rmem_max = 16777216 # Or tune to your needs ..then restart the sync daemon (ipvsadm --stop-daemon master, ipvsadm --start-daemon backup --mcast-interface <dev>). Same on the backup. This solved the problem right away. s. _______________________________________________ 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