nxserver.bin 100% usage when no sessions active

[derekcheeseman]

Hi,

I’m running NoMachine 6.8.1 on PopOS 19.04 and am seeing issues with nxserver.bin high CPU usage. When I monitor it in top, it seems to appear for 10 seconds and consume a full core at %100, then disapear for 10 seconds. This happens only during or after a remote control session and if I reboot it does not seem to appear until I initiate a remote session. Although not recent, the machine is a Haswell i5 so I wouldn’t expect to see something talking up a core even if there is no remote control session active.

Thanks in advance for any help!!

[Mth]

Hello

The nxserver does a bit of monitoring in the background, NoMachine processes graphic environment tracking, which is not
always readily available in the system.

The 100% cpu usage after connection is unacceptable and abnormal though (unless of course there is a lot of swapping going on).

Could you please gather some logs for us to check this issue?

Article on how to collect logs:

https://www.nomachine.com/DT10O00163 (“How to gather debug logs for support requests”)

Please enable them, restart the nxservice:

‘# /etc/NX/nxserver –restart’

and then connect to the machine.

Also please include the strace for this nxserver.bin process.

‘# strace -f -p <nxserver.bin PID> &> strace.log’

You can find the nxserver.bin PID in the top view. Please let this command run for a full cycle of 100% usage and then terminate it with ctrl-c.

After gathering logs, please send them to forum[at]nomachine[dot]com using the title of that forum’s thread as the mail’s subject.

/Mth

[Author]

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