Hi @Vipul ,
You may describe your use-case in the Actor's Issues tab and ask to implement such a feature (possibly with extra option on the Input).
There's also another issue of the actor starting off with less RAM usage but maxing out (16 GB) after a few hours of runtime running up our bills.
If you start the Actor on Apify Platform with certain amount of RAM the consumption for running should be always fixed no matter how much RAM is currently in use.
If you have specific Run-related problem (like the consumption is increasing and the Run fails on OutOfMemory), please raise an Issue in Actor's Issues tab.