High CPU usage & Memory leak

Question

Hello,

I've a leak memory and high CPU from lanmanServer and System (ntoskrnl.exe).

The system (ntoskrnl.exe) is on 19%-20% CPU usage all the time and the Lanmanserver is starting from 40MB RAM and will continue until the Memory usage will be full and eventually the machine will crash. Do you have any idea how to fix this?

I think that was started when i updated windows 10 to 2004 version, Also the Windows update window is all the time is on progress with the Yellow icon, unless i get in and check if there are a new version and then the icon change to green.

Answer 1

Hi Ronen,

I'm Independent Advisor not Microsoft employee or support person. But I'm in contact with Windows developers since 1995 - as a one of the best Windows beta-testers till 2009 when program was closed, as an MVP in 2005-2017 including Windows System & Performance nomination. So I have deep enough Windows knowledge and you may trust me. It's a pleasure for me to help others and I'll do all my best to help you.

Memory leak in services can be analysed using poolmon tool.

See

https://support.microsoft.com/en-sg/help/177415...

https://blogs.msdn.microsoft.com/ntdebugging/20...

https://blogs.technet.microsoft.com/yongrhee/20...

Answer 2

You are not the only one, seen this popping up in several threads in different places. This has one of our PC's on its knees in under 40 minutes. 0-24GB ram eaten up. I've updated every driver I can find updates for, still it keeps happening.

Temporary solution is to disable the service "Server" or to stop it every time it gets too high for your PC to use. It is auto set to restart the service after 1 minute anyway.... which you can change too, or just disable it, but you may get file/print service issues if you do.

Not had anything "not" work for me on that machine while I'm troubleshooting it with the service disabled.

As for the "other" reply. Oh great you are just telling someone to use poolmon, with all that experience and connection you mention - no wait - brag about , with no extra insight. seriously?

Good luck!