How does memory work on the Haswell MBPr?

[Hieveryone]

I have a 13" MBPr late 2013 with 8 GB RAM.

It says Physical Memory is 8.00 GB

Memory Used: 6.68 GB

Virtual Memory: 8.00 GB

Swap Used: 0 bytes

App Memory: 3.87 GB

File Cache: 1.90 GB

Wired Memory: 932.3 MB

Compressed: 772 KB

What does all this mean?

 

[Weaselboy]

https://support.apple.com/en-us/HT201464

Good tech support document here from Apple that explains what each one of the memory sections means.

 

[Freyqq]

SWAP used is the storage space being used by the SSD to fill in for lack of ram. It is 0 MB, which means that the ram you have is covering all your uses. That's the only one on the list that really matters. The rest explain how your RAM is being used, for what purpose, and how much of it was compressed, etc.

 

[GGJstudios]

I have a 13" MBPr late 2013 with 8 GB RAM.

It says Physical Memory is 8.00 GB

Memory Used: 6.68 GB

Virtual Memory: 8.00 GB

Swap Used: 0 bytes

App Memory: 3.87 GB

File Cache: 1.90 GB

Wired Memory: 932.3 MB

Compressed: 772 KB

What does all this mean?

It is quite normal for all of your memory to be in use by OS X. It does not mean that you are running out of memory or that it is maxed out. OS X will manage all available memory, making it available to apps on an as-needed basis. Refer to the following Apple support article for more information on how to understand your Activity Monitor readings.

OS X Mavericks: About Activity Monitor​

The combination of Free, Wired, Active, Inactive & Used memory statistics in previous versions of Activity Monitor have been replaced in Mavericks with an easy to read "Memory Pressure" graph.
Memory pressure is indicated by color:

• Green – RAM memory resources are available.
• Amber – RAM memory resources are being tasked.
• Red – RAM memory resources are depleted and OS X is using the drive for memory.

 

[Meister]

SWAP used is the storage space being used by the SSD to fill in for lack of ram. It is 0 MB, which means that the ram you have is covering all your uses. That's the only one on the list that really matters. The rest explain how your RAM is being used, for what purpose, and how much of it was compressed, etc.

According to used swap is not necessarily a sign of lack of ram.
All macs I have seen since mavericks use swap if they are used for a while.

 

[Freyqq]

According to used swap is not necessarily a sign of lack of ram.
All macs I have seen since mavericks use swap if they are used for a while.

True, I was just simplifying it a little. The memory pressure graph is suppose to be the best way to see if you need more ram in 10.10.