Memory Issues FG81E after update 7.4.4

[RolandBaumgaertner72]

Hi,

we use this HA FG81 cluster in one office with 30-40 people (no VPN, normal usage, % 2000 sessions, etc.). We experienced now that with every new 7.4.X update we increase memory usage so that now we have like 75% memory usage.

We did already some changes with some CLI commands but only disabling IPS would affect the memory and now we are at 68% with no IPS in all polices.

We kind of can live with that, but can we expect now with every update more memory usage?

Thanks,

[srajeswaran]

Do you know which process is running with high memory usage?

diagnose sys top-mem -> wll give the process with high memory usage. Please run multiple time if the same process is utilizing more memory
diagnose debug crashlog read -> Check if any process is crashing.

[RolandBaumgaertner72]

Hi Suraj,

before we had like x ipsengine:

# diagnose sys top-mem
node (152): 66118kB
ipsengine (388): 23203kB
ipsengine (391): 21656kB
ipsengine (389): 21631kB
ipsengine (390): 21313kB
Top-5 memory used: 153921kB

I dont know if it takes some time but we dont have ips activated in any rule anymore.

Question is more what we can expect from the next updates, if we have to do something now every time we update the FGs.

Thanks!

[srajeswaran]

Can you restart ipsengine using "diagnose test application ipsmonitor 99" and check if memory usage comes down?

if you are not enabling ips and still the memory usage is going up, I would recommend opening a ticket to get this investigated. In the meantime we may configre an automated restart of the process as suggested in follwing article  https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-restart-WAD-or-IPS-engine-using-aut...

https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-stop-and-restart-the-IPS-engine-ver...

[jbernabe]

Try to optimize your IPS engine by following this KB link: https://community.fortinet.com/t5/FortiGate/Technical-Tip-IPS-memory-optimization-steps/ta-p/197486

You may also upgrade your IPS engine to the latest version.
Reference: https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-manually-upgrade-the-IPS-Engine/ta-...

Regards,
Jef