hey Leo, you are @kohrar are you? (https://github.com/apache/cloudstack/pull/8694) as discussed further improvements might be desirable.
On Wed, Feb 21, 2024 at 7:36 PM Leo Leung <l...@steamr.com> wrote: > > I did some basic performance analysis on the Java process and it appears the > high CPU usage stems from the NIOSocketInputStream class which is part of the > new secure KVM VNC feature released with ACS 4.18. > > In the mean time, I've sized up the Console Proxy VM compute offering with > more CPUs (1 vCPU for each potential connection) as each connection gobbles > up an entire core's worth of CPU. > > -Leo > > > > On 02/20/2024 4:51 PM MST Leo Leung <l...@steamr.com> wrote: > > > > > > Just a quick update: > > > > - I see 100% CPU on the console proxy's java process if one or more VNC > > session is in use, even if nothing is happening in the session (such as a > > blank screen). Is this normal? > > - The persistent 100% CPU appears to be triggered when I try to VNC to the > > console proxy itself. Connecting the console proxy to itself somehow causes > > the VNC connection to persist until I run 'systemctl restart cloud' on the > > console proxy and immediately disconnect from the console. Since the VNC > > connection happens to the underlying KVM process on the hypervisor, I'm not > > quite sure why this is even a problem. > > > > Is this a potential bug with the cloud/proxy service? > > > > -Leo > > > > > > > On 02/20/2024 4:16 PM MST Leo Leung <l...@steamr.com> wrote: > > > > > > > > > Hello everyone, > > > > > > I am running CloudStack 4.18 and 4.19 in two separate environments and > > > notice that in both environments, the Console Proxy SystemVM is pretty > > > much pegging its single CPU. Logging in to the SystemVM, top reports the > > > java process that handles the VNC connections is constantly using ~100% > > > CPU. This behaviour happens even on a cleanly provisioned console proxy > > > (after deleting/recreating it) with only a 4-5 established VNC > > > connections (as reported by netstat -ntp). > > > > > > Is this normal? Does anyone else experience this behaviour? Should I > > > assign a larger console proxy compute offering? > > > > > > Thank-you in advance. > > > -Leo -- Daan
