[RAM Tweak] - Force an application to stay in RAM - build.prop tweak

[alucardx]

All credit goes to Eiertschik @ [ROM] CyanogenMod 7.2.0 RC0 (Android 2.3.7) - Page 711 - xda-developers

This tweak can force an app to stay in RAM simply by adding a string of text to /system/build.prop along with the internal process name (com.foo.bar)

There are two lines in /system/build.prop named "sys.keep_app_1=" and "...2"

Here you can enter process names.
You can figure them out with... Auto Memory Manager


Keep in mind that this option locks the app's priority to 0 which means totally unkillable.

If you want to stop such an app you'll have to go to the running apps in Android settings and press "Stop process".

If you kill it via Taskkiller or any other app it will restart.

For instance, my entry in build.prop is

sys.keep_app_1=com.jrtstudio.music

Ever since I started using Gingerbread ROMs, Android Music would keep losing where I was at in the middle of a mp3 via a "Pause". I listen to 1-2hour radio mp3 shows and obviously need it to pause and remember where it's at in the mp3 so when I listen again it picks up where it left off. In Froyo I never had an issue, I've always used the built in Android Music app and the Widget. In SS5.6 I had this issue sometimes, and in SD9.0 it always happens. With or without v6 supercharger, the OS would keep killing android music so it would lose the file handle and thus "forget" it's place in the mp3 file.

The key point here it's based on app name, not PID, so it only needs to be set once.

I also rebooted my phone, and it picked back up exactly where it left off! Finally, just like Froyo. I tried using Auto Memory Management app to do this but, #1 it's an extra app that I don't want, #2 it didn't really work and was based on PID. So anytime it was rebooted or Music was killed, it would get a different PID.

[metalspring]

does this actually work??? i've never heard of it before???

[alucardx]

does this actually work??? i've never heard of it before???

yes, it's working for me. but i've only used it for android music.

there's a lot of goodies over xda forum but this one was buried in a CM7 thread.

[meishkov]

I'm not sure, would be amazing if it does. Kinda weird how now these 2 RAM tweaks that seem pretty major would come out now?

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[metalspring]

I asked Zeppelinrox about it and he said that its only on some cyanogenmod 7 based roms... So I guess you might be able to tell is run it in terminal emulator first with setprop sys.keep_app_1 = com.jrtstudio.music

[meishkov]

So anything after setprop puts it into build.prop?

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[metalspring]

So anything after setprop puts it into build.prop?

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Not really, it does the same thing as putting it in build.prop but only for that one time, it doesn't stick on reboot usually... Its just to see if it works

[meishkov]

I'll just edit build.prop manually, I've done it 200,000 times before so it's probably quicker. Was thinking about putting LatinIME.apk in and see if that works. Think that'd be a problem?

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[meishkov]

Any insight as to whether this is the better option, I'm assuming so, instead of using zeppelinrox v6 supercharger that has a bulletproof app option? Looking to lock swapper2 in so it won't get killed or "restarting" and screw up my 256mb swap partition. I need that sucker

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