Refurbs

dogslobber

macrumors 68040
Original poster
Oct 19, 2014
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Apple Campus, Cupertino CA
Notice that the 16gb models always go fastest for the 13" MBP models. That should give you hints to where the market is going. Don't be caught out by ordering an 8gb model.
 

Zakzilla

macrumors member
May 11, 2015
80
52
Los Angeles
Notice that the 16gb models always go fastest for the 13" MBP models. That should give you hints to where the market is going. Don't be caught out by ordering an 8gb model.
Yeah just today I opened up Activity Monitor and saw I'm using 9.5GB/16GB with normal usage (no design apps open or anything, just Chrome, Spotify, Notes, Email). 8GB would not be enough for me, and the fact Apple still sells 4GB is ridiculous to me. OS X Yosemite uses more than that on its own
 

yjchua95

macrumors 604
Apr 23, 2011
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GVA, KUL, MEL (current), ZQN
Yeah just today I opened up Activity Monitor and saw I'm using 9.5GB/16GB with normal usage (no design apps open or anything, just Chrome, Spotify, Notes, Email). 8GB would not be enough for me, and the fact Apple still sells 4GB is ridiculous to me. OS X Yosemite uses more than that on its own
You're reading memory values wrong.

Ever since Mavericks, RAM compression and caching have been introduced. So free RAM is wasted RAM. What you should look at is the memory pressure graph. If it's green, all well and good. Free RAM values are irrelevant, as OS X will use as much RAM as it can for compression and caching.

With these two, 8GB of RAM will act like 12GB of RAM, or around that. I'll repeat myself once more - free RAM is wasted RAM.
 

Zakzilla

macrumors member
May 11, 2015
80
52
Los Angeles
You're reading memory values wrong.

Ever since Mavericks, RAM compression and caching have been introduced. So free RAM is wasted RAM. What you should look at is the memory pressure graph. If it's green, all well and good. Free RAM values are irrelevant, as OS X will use as much RAM as it can for compression and caching.

With these two, 8GB of RAM will act like 12GB of RAM, or around that. I'll repeat myself once more - free RAM is wasted RAM.
I see, I attached a screenshot of that section (with most of my apps closed down). You're saying that Memory Pressure graph is the real indicator? What does it look like when you're running out?
 

Attachments

Samuelsan2001

macrumors 604
Oct 24, 2013
7,694
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The graph hoes orange when the memory is getting tight and red when it really hasn't got enough for the current workload.
 

dogslobber

macrumors 68040
Original poster
Oct 19, 2014
3,809
5,648
Apple Campus, Cupertino CA
I see, I attached a screenshot of that section (with most of my apps closed down). You're saying that Memory Pressure graph is the real indicator? What does it look like when you're running out?
Run memory_pressure if you want to see the graph in full flight.

bash-3.2$ sudo memory_pressure -l
memory_pressure: option requires an argument -- l
Usage: memory_pressure [options] [<pages>]
Allocate memory and wait forever.
Options include:
-l <level> - allocate memory until a low memory notification is received (warn OR critical)
-p <percent-free> - allocate memory until percent free is this (or less)
-s <seconds> - how long to sleep between checking for a set percent level
-w <percent-free> - don't allocate, just wait until percent free is this then exit
-v <print VM stats> - print VM statistics every sampling interval
-Q <quiet mode> - reduces the tool's output
-S - simulate the system's memory pressure level without applying any real pressure

bash-3.2$
 

yjchua95

macrumors 604
Apr 23, 2011
6,725
231
GVA, KUL, MEL (current), ZQN
I see, I attached a screenshot of that section (with most of my apps closed down). You're saying that Memory Pressure graph is the real indicator? What does it look like when you're running out?
The memory pressure graph will rise and turn orange, before going red. And when it's red, swapping will happen with the hard drive.
 
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