Photoshop consumed too much of RAM (more than 30gb of RAM)

[SKK5]

I have a PSB project file and the file size is 7gb. But it takes more than 30gb of RAM which is insane. I checked Activity Monitor from Mac and Photoshop itself used up to 45gb of RAM!! Seriously?

I have no idea why Photoshop consumes a lot of RAMs but this is something that I can not understand. Is this because Adobe Photoshop's optimizations are still poor?

[Nancy OShea]

Look in Preferences > Performance. 

How much RAM are you allocating to Photoshop?

Look in Scratch Disk.  How much free Scratch Disk space do you have?

[SKK5]

I maxed out the RAM storage. 

The scratch disk has 1TB of free space. SSD based.

[lambiloon]

Hi yes from there you can control how much RAM photoshop can use....regards

[SKK5]

I dont understand. Isn't it better to max out the RAM storage?

[D Fosse]

Never do that! Other applications and system processes need memory too. You're choking the whole system. The slider is there for a reason. For instance, ACR runs in its own address space and uses memory outside Photoshop.

Your numbers seem perfectly normal. Every history state takes up memory, every layer takes up memory. One history state may require up to double memory. This is the nature of raster image editing.

As long as you have a healthy scratch disk setup, memory usage is not a problem. Just leave some of it for the rest of the system.