Hi Jesse The system is still experiencing delay with more than 12000 flows.
Is there anything I can do about this - will getting a faster CPU help? Thanks On 17/04/2013, at 10.19.21, Kristoffer Egefelt <kristof...@itoc.dk> wrote: > OK - any suggestions on how to calculate the right value ? > Could you explain the consequences of increasing this value ? > > I ran > > ovs-vsctl set bridge xenbr0 other-config:flow-eviction-threshold=20000 > > the flows are stabilizing around 12-15000 > > Memory usage went from 12M to 14M - but the CPU load is still high > 94% > > But the latency actually went back down from 1.5 seconds to 500ms, which is > normal. > > So this looks like it worked, even though the CPU usage remains high… > > Thanks. > > > On 16/04/2013, at 21.52.46, Jesse Gross <je...@nicira.com> wrote: > >> On Tue, Apr 16, 2013 at 3:47 AM, Kristoffer Egefelt <kristof...@itoc.dk> >> wrote: >>> Thanks Jesse, >>> >>> I have a NAT firewall which logs something like this every second - OVS is >>> processing ~400.000 packets/s - and I'm having issues with response times >>> or even timeouts when load > 96%. >>> Is there anything I can do about the latency/CPU usage, other than not >>> running OVS on the NAT firewalls ? >> >> There is a fair amount of work going on to improve in this area. If >> you have a large number of established flows (instead of just new flow >> setups), one thing that might help is to use >> ovs-vsctl set bridge BR other-config:flow-eviction-threshold=X >> to set the threshold above your expected number of sustained flows. >> The default value is 1000. >> _______________________________________________ >> discuss mailing list >> discuss@openvswitch.org >> http://openvswitch.org/mailman/listinfo/discuss >> > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
