[VIRTUAL MEMORY] [PAGING] FOR iOS7 (works on all iOS 3 to 7)

[VIRTUAL MEMORY FOR iOS7]

iOS Virtual Memory

Virtual memory trick with "Dynamic_Pager" is known since iOS 3 introduced for all iDevices.

It tricks system to believe and suspend it's "Random Memory" on PageFile of a defined size from 256 to 512 MBs could even be more. The truth behind this trick is that it doesn't always do use it's suspended memory from the NAND (/var/vm) which could cause system instability mostly because of the Mobile Substrate Extentions similar to repeated reboot can brick your device on a long run.

However, it could be useful if you don't like to free up your memory every time it gets low. Saying that I mean whenever you stop using a process it gets suspended and saved by the PageFile freeing a quite enough memory you could have earned by freeing up RAM by yourself.

What is Dynamic Library?

You can think of a program that can backup your messages and contacts with itunes. It does the same it caches your suspended memory and system memory on a Page File calling it Virtual RAM or Virtual Memory. It doesn't gives ability to turn your iDevice Flash Memory (NAND) to Random Access Memory (RAM) but similar.

What issues are involved?

i. Using a PageFile could cause problem if your device start to fragment the swapped processes mostly when system starts this process i.e. dynamic_pager. (BOOT)

ii. System Processes are vital process necessary for your system and putting them into Paged is quite creepy and could cause night mare. (BOOT)

iii. It is a background process and uses a quite an amount of battery. (BATTERY)

iv. RAM has a faster read and write cycle which has a frequency count in MHz which is very high compared to Flash Memoy and can take a while processing back a suspended. (SYSTEM PROCESSES)

Is there a Play Safe Option?

Yes always. If you want to try to know  how it works for you or how it can be helpful. You can do this simply following some precautions that'd save you from a bootloop and bricking your device.

How to install it?

Get a iFile, Status Modifier and Cleaner (it cleans RAM) from Cydia.

Add this REPO: http://cydia.myrepospace.com/ADR/ and install VM3

VM3 works on all iOS beside it will end up with an error code while configuring installation on Cydia and won’t show up if it’s installed.

Fact is that the 3 files will be installed

I.                   “dynamic_pager” in /sbin (STOCK)

II.                “com.apple.dynamic_pager.plist” inside /System/Library/LaunchDeamons

III.             “com.apple.virtualmemory.plist” in /var/preferences

After Reboot a file swapfile0 will be created in /var/vm (vm represents virtual memory)

PRECAUSION

Don’t frequently reboot your device after installing it.

After every boot change the file using iFile/System/Library/LaunchDeamons/com.apple.dynamic_pager.plist using:

i)                   Property List Viewer: TURN “OFF” RunAtLoad to prevent loading it on BOOT UP and back “ON” to use it again.

ii)                Text File:

Change this value

<key>RunAtLoad</key>

<true/>  to  <false/> to switch between OFF and ON

Idea behind this is to save the Virtual Memory from fragmenting the suspended processes.

IF /System/Library/LaunchDeamons/com.apple.dynamic_pager.plist TURNED ON RIGHT NOW THEN TURN IT OFF SO IF YOU BOOT AGAIN YOU CAN DELETE /var/vm/swapfileX AND TURN IT BACK ON AND REBOOT TO USE VIRTUAL MEMORY (PAGE FILE AGAIN)

How do I know if it worked for me or not?

Better option is installing Status Modifier before so you can see your free random memory on status bar and a Cleaner app that can show you approximate System Mem and you can also clean RAM efficiently better than SBSetting.

TESTED ON iPhone 5c (it has enough memory so it doesn't count)

ALTERNATIVE

I am lazy and I can’t follow these for booting my iDevice every time. I need other safe way to use get free RAM!

You can use Background Manager and in setting you can stop background suspension

GO TO Settings/ Background Manager/ Global/

Turn None on Primary (Background) Mode and Native on Secondary. 
So you can switch whenever you want any app in background.

Cleaner or MemBooster can free your RAM temporarily.

Don’t use heavy Winterboard themes, Springboard extension tweaks and all useless mod to improve UI it takes a lot of memory.

COMMENT IF I HAVE MISSED ANYTHING OR WANT TO KNOW MORE ABOUT IT.

iMessage and Tweet me always for help.

HAVE FUN PLAYING