@Hourfilms, you seem to fail to understand the technicalities of how ram works
your computer is attempting to use as much ram as it can so it can minimize the calls to disk (storing the original 2 minute video in ram) and minimizing re-calculations (probably storing the uncompressed raw video in ram of the current edited status or something..)
when you load a program on a 16gb machine it will use more ram than on an 8gb machine - from that observation you can't directly say that the 8gb machine would be noticeably slower with out analyzing the actual data stored in ram
on a 16gb machine FCP will use more data / or leave more crap in your ram than on an 8gb machine, this is to increase speed
for example, if you opened chrome after a reboot, it needs to access the ssd and load the required data into ram, when you close chrome, it marks all that data in ram as 'inactive' if another program needs more ram then the 'inactive' chrome data will be replaced with the active important data - the point is that when you next open chrome it checks the ram for 'inactive' chrome data and re-activates it rather than having to load the data from the ssd (which is much slower)
you don't want to be removing that inactive ram, it is making your computer much faster, it will automatically be over written if another program needs the ram space
you WANT your computer to be at 100% ram usage - the more inactive crap you have in ram the faster your computer will be
I actually did semi-intense editing on Final Cut Pro on my rMBP last night and it went from 14GBs of ram free to 163mbs. That is very alarming. It was a 2 minute video with minimal editing. Everything ran smooth rendering was quick but WTF. How is it conceivably possible to only work with 8GBs of RAM. I would die.
your computer is attempting to use as much ram as it can so it can minimize the calls to disk (storing the original 2 minute video in ram) and minimizing re-calculations (probably storing the uncompressed raw video in ram of the current edited status or something..)
when you load a program on a 16gb machine it will use more ram than on an 8gb machine - from that observation you can't directly say that the 8gb machine would be noticeably slower with out analyzing the actual data stored in ram
on a 16gb machine FCP will use more data / or leave more crap in your ram than on an 8gb machine, this is to increase speed
for example, if you opened chrome after a reboot, it needs to access the ssd and load the required data into ram, when you close chrome, it marks all that data in ram as 'inactive' if another program needs more ram then the 'inactive' chrome data will be replaced with the active important data - the point is that when you next open chrome it checks the ram for 'inactive' chrome data and re-activates it rather than having to load the data from the ssd (which is much slower)
I had 24gigs in my iMac and would always push it to 22-23. So I guess I don't know why I am so alarmed. Actually out of the 15.8 that was being used my activity monitor showed that 6.81 was inactive. I still haven't figured out how to purge the inactive files to redistribute memory back to programs in need. I hate when that happens. So essentially I lost a significant amount of processing power.
you don't want to be removing that inactive ram, it is making your computer much faster, it will automatically be over written if another program needs the ram space
There are four ways that RAM is described by the system: free, wired, active, and inactive.
Free RAM
Being rather self-explanatory, this is the amount that has not been recently used by an application or system process.
Wired RAM
This is the amount that must be kept active for the system to run. This RAM cannot be written to virtual memory on the hard disk.
Active RAM
This is the current amount of memory besides wired RAM that is being used by system and user processes.
Inactive RAM
This is the amount that has recently been used but is no longer required. It may have been used by a recently quit process, or by an active one that no longer needs it, and is not required for use. This RAM is essentially free RAM, with the exception that OS X has kept track of what has recently been loaded into it. [ the reason why it is not deleted, is because if you open up the program that you just closed (or whatever) the system can re-mark the ram as active rather than loading it from disk again]
In regards to memory, the rMBP is supposed to use lots more RAM right? I thought I recalled seeing that people were using 5-6 GBs out of just basic usage. Perhaps this will be changed in Mavericks?
you WANT your computer to be at 100% ram usage - the more inactive crap you have in ram the faster your computer will be
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