All, I'm not sure what the issue is here, but I wanted to know if there was an easy explanation for this.
We've been doing some load testing of HAProxy and have found the following: HAProxy (both 1.4.15 and 1.4.19 builds) running under Gentoo in a 2 vCPU VM (Vsphere 4.x) running on a box with a Xeon x5675 (3.06 GHz current gen Westmere) maxes out (starts throwing 50x errors) at around a session rate of 3500. However, copies of the same binaries pointed at the same backend servers on a Gentoo box (bare metal) with 2x E5405 (2.00GHz - Q4,2007 launch) top out at a session rate of around 8000 - at which point the back end servers start to fall over. And that HAProxy machine is doing LOTS of other things at the same time. Here's the reason for the query: We're not sure why, but the bare metal box seems to be balancing the load better across cpu's. (We're using the same config file, so nbproc is set to 1 for both setups). Most of our HAProxy setups aren't really getting hit hard enough to tell if multiple CPU's are being used or not as their session rates typically stay around 300-400. We know it's not virtualization in general because we have a virtual machine in the production version of this system that achieves higher numbers on lesser hardware. Just wondering if there is somewhere we should start looking. TIA. matt
