Memory usage increases everyday after upgrading to 7.6.0

Welcome to the club. It's the same with 7.4.5. There have been massive memory leaks in the whole 7.4.x branch for about a year now. I'm beginning to give up on Fortinet. I sold my stocks today. 
Try to switch off IPS as much as possible (small database, as few updates as possible), this mitigated the problem a little, but not really. Also configure automation stitches to restart ips service, set ips to pass-trough mode in conserve and restart fortigate if it enters conserve. 

Hi,

First thing is to figure out which daemon is spiking
diag sys top

get sys perf status >> will give you the total usage

diag debug crashlog read >> will give you if any daemon is crashing

optimize memory
https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-optimize-the-Memory-consumption/ta-p/192323

Hello @vnkhwazi,

7.6 is still new and yes, it has memory issues. This is one of them https://community.fortinet.com/t5/FortiGate/Technical-Tip-WAD-wad-config-notify-process-consumes-high-Memory/ta-p/328385

Did you check which process is causing high memory usage? https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-How-to-do-initial-troubleshooting-of-high/ta-p/194874

Currently, 7.0.10 is considered the most stable version: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Recommended-Release-for-FortiOS/ta-p/227178

Regards, 

Hi wnkhwazi,

Once you confirm which process is causing the high memory utilization according to the community links provided by my colleagues you can use the following feature to automatically restart the WAD process, in case it is the root cause of the issue. 

Technical Tip: Use a new FortiOS mechanism to automatically restart WAD workers

In case it is not WAD, you can use automated stitches as mentioned.