High Memory Usage After OPNsense Upgrade to 26.1.11_10

[elvinmammadov]

Hello,

We upgraded our OPNsense system from version 25.7 to 26.1.11_10 yesterday and noticed a significant increase in memory usage.

The system has 8 GB of RAM. Since the upgrade, memory usage has been around 76% and sometimes reaches 90%. Before the upgrade, it was usually between 20% and 30%.

How can we identify what is causing the high memory usage?

[nero355]

How can we identify what is causing the high memory usage?

Connect via SSH and run top should do the trick ?!

I am guessing it's this : https://docs.opnsense.org/manual/neighbors.html#settings
Disabling HostWatch should bring things back to normal again.

[elvinmammadov]

Thank you for your reply.

This system is running OPNsense. I disabled "HostWatch," which reduced RAM usage from approximately 90% to 78%. However, memory usage was previously only around 20–30%.

The attached top output shows that the suricata process is using about 5.8 GB of resident memory, so it appears to be the main contributor to the high RAM usage.

Could you please advise what may be causing this and how I can reduce the memory consumption?