Please add some more information to your topic:
The firewall is running on 9.0.3-h3 and having model PA-220 and early the fw upgraded to 9.0.3-h3.
I found below information from paloalto docs. But the issue is for pa-3000 and pa-5000 then why in PA-220 issue occurs.
How to check linux kernals on panos 8.x/9.x have the memory leak.
You should update to PAN-OS 9.0.9-h1 as this is currently the preferred release by PaloAlto (https://live.paloaltonetworks.com/t5/customer-resources/support-pan-os-software-release-guidance/ta-...). The fix for your issue probably already is included in PAN-OS 9.0.4 as this could be Bug PAN-112988 (Release notes of PAN-OS 9.0.4 you can finde here: https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-release-notes/pan-os-9-0-addressed-issues/pan-os...)
For a confirmation about which bug you are facing you should generate a tech suppport file and create a TAC case.
We as "normal" users do not have the detailed informations about the bug, so only TAC is able to confirm if your situation is because of a specific bug.
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