It looks the memory usage is going up significantly recently. There is no recent changes on hardware, software and configuration except normal firewall changes. I am afraid of Check Point gateway will freeze after this counter reached certain high number based on some SKs such as sk66482, sk110362,
sk35496 lists a bunch of methods how to detect memory leak. In my this specific case, the fix was simple, just installed a latest Jumbo Hotfix 205 for R77.30.