cached ram 25+ gigs.. normal?

[peteypab2133]

running imovie and photoshop cc simultaneously and pushing about 14 gigs physical memory while rendering a 5 gig 20 minute movie.

I noticed that the cached ram keeps increasing, but never goes away.

Computer doesnt seem to feel sluggish, and imovie certainly runs more efficient than my premier pro or FCPX so for home videos I often use it,.

Is there any way to remove the cached files? restart of computer or cache dump?

Is there any reason why I would want to do that anyways, or am I beating a dead horse here?


Thanks
picture attached.

 

[Fishrrman]

When the rendering is done, power down (all the way off) and reboot.
Does that change anything?

 

[mj_]

Yes, that is normal and expected behavior. Don't reboot, and don't try to flush the cache by using RAM optimizers and the like. Unused RAM is wasted RAM. Modern operating systems use whatever RAM is available to cache files, applications, and data. This cache is considered free by the memory management unit and will thus be used as soon as requirements change. As long as you do not actively require this part of your system memory, the operating system will use it as cache to speed up operations.

We have servers at work with 128GB of RAM that serve solely as cache for the database. Thus, after a few days of uptime active RAM usage is only around 500-700MB with 127GB in cache.