Jailbroken iPhone 3GS RAM issue.

[Black@pple]

Hello everyone.

Here's the problem :

Since I have my iPhone jailbroken with Greenpois0n RC5 on 4.2.1, I have a lot of memory (RAM not storage) issue. It acts everytime like that :
First when I boot up my memory is about 135mb (I have it shown on my status bar with SBSettings) and that's normal but after 5 minutes of use or so, my free memory decrease a lot and is between 20mb to 5mb and I have never more than 5 apps opened. And then when I have only 20mb or lower free memory my iPhone get very slow (who is normal) and apps crash everytime and when I open an app who uses a lot of memory (like whatsapp) my springboard crashes and get in safe mode.

That's very, very annoying so if someone has a solution for this issue it would be really appreciated!

Thanks!
BP

[Goof]

I would suggest a restore.

[Poseidon79]

Even my iPhone 4 gets down below 50MB free with 5 or 6 apps open. I am constantly closing down apps I don't need and hitting the Free Memory button to keep things efficient. If you have a ton of mobile substrate apps installed that can be eating away at your RAM.

[iYeow]

3gs has only 256 RAM, with 2 or 3 apps, memory goes down to 20 or 30 mb is pretty normal.

[Orby]

3gs has only 256 RAM, with 2 or 3 apps, memory goes down to 20 or 30 mb is pretty normal.

Indeed.

SpringBoard and other daemons eat up 95-110 MiB by themselves (and it's necessary for those apps to run at all times).

Any app that's in the background but doing something actively (e.g., playing audio or listening on a SIP port) will be an active app with active threads and active memory allocation that will not get dumped easily by the kernel (and they usually require a significant memory allocation).

To see how damn quick RAM can disappear, run ps -el on a root shell...

UID PID PPID F CPU PRI NI SZ RSS WCHAN S ADDR TTY TIME CMD
0 1 0 80004000 0 31 0 275168 444 - Ss 81af7d68 ?? 1:20.08 /sbin/launchd
0 13 1 4000 0 33 0 289304 932 - Ss 81af76b4 ?? 0:04.07 /usr/bin/sbsettingsd
0 16 1 4000 0 31 0 275684 420 - Ss 81af7000 ?? 0:38.44 /usr/sbin/syslogd
0 19 1 4000 0 33 0 291336 3868 - Ss 8545e8f0 ?? 1:18.15 /usr/libexec/lockdownd
501 21 1 4000 0 61 0 314388 6416 - Ss 8545e478 ?? 1:28.46 /usr/sbin/mediaserverd
65 22 1 4000 0 33 0 276752 1116 - Ss 8545e23c ?? 0:51.27 /usr/sbin/mDNSResponder -launchd
0 23 1 4002 0 47 0 307072 6992 - Rs 8545e000 ?? 35:50.06 /usr/libexec/locationd
501 24 1 4100 0 31 0 279420 1700 - Ss 85676d68 ?? 0:01.50 /usr/sbin/fairplayd.N90
0 26 1 4008 0 97 0 296768 2532 - Ss 856768f0 ?? 15:27.77 /usr/libexec/configd
501 28 1 4000 0 33 0 290748 1352 - Ss 85676478 ?? 0:30.79 /System/Library/PrivateFrameworks/ApplePushService.framework/aps
501 29 1 4000 0 33 0 275696 676 - Ss 8567623c ?? 0:08.24 /usr/sbin/accessoryd
25 35 1 4000 0 33 0 307336 4048 - Ss 855d6478 ?? 3:40.64 /System/Library/Frameworks/CoreTelephony.framework/Support/CommC
501 36 1 4000 0 33 0 302592 2796 - Ss 855d623c ?? 0:54.08 /usr/sbin/BTServer
0 37 1 4100 0 31 0 273452 432 - Ss 855d6000 ?? 2:04.43 /usr/sbin/notifyd
501 138 1 4000 0 33 0 292040 3304 - Ss 81af78f0 ?? 0:05.56 /usr/libexec/lsd
501 141 1 4000 0 33 0 290644 1208 - Ss 84c54478 ?? 0:10.07 /System/Library/PrivateFrameworks/IMCore.framework/imagent.app/i
501 2091 1 4000 0 63 0 497728 34656 - Ss 85676000 ?? 26:46.11 /System/Library/CoreServices/SpringBoard.app/SpringBoard
501 2103 1 4000 0 47 0 412944 20344 - Ss 855d6d68 ?? 0:13.35 /Applications/MobilePhone.app/MobilePhone
501 2104 1 4000 0 33 0 443776 38548 - Ss 84c54d68 ?? 0:46.03 /Applications/MobileMail.app/MobileMail
0 2193 1 4000 0 33 0 275744 472 - Ss 84c546b4 ?? 0:24.69 /System/Library/Frameworks/SystemConfiguration.framework/SCHelpe
501 3065 1 4000 0 33 0 301308 2628 - Ss 8545e6b4 ?? 0:01.73 /usr/libexec/ptpd -t usb
501 3069 1 4100 0 31 0 272908 452 - S 81af723c ?? 0:00.66 /usr/libexec/afcd --lockdown -d /var/mobile/Media -u mobile
501 3071 1 4000 0 33 0 275708 520 - S 855d68f0 ?? 0:00.03 /usr/libexec/notification_proxy
501 3078 1 4000 0 15 18 303740 4000 - SNs 85676b2c ?? 0:03.72 /System/Library/PrivateFrameworks/DataAccess.framework/Support/d
501 3093 1 4000 0 47 0 386036 8360 - Ss 84c54000 ?? 0:05.06 /Applications/MobileMusicPlayer.app/MobileMusicPlayer
501 3094 1 4000 0 47 0 291212 2504 - Ss 81af7b2c ?? 0:00.21 /System/Library/PrivateFrameworks/MediaRemote.framework/Support/
0 3183 1 40004000 0 31 0 274000 444 - Ss 855d66b4 ?? 0:00.02 /usr/libexec/launchproxy /usr/sbin/sshd -i
0 3184 3183 4100 0 31 0 274824 1356 - S 8545ed68 ?? 0:00.30 /usr/sbin/sshd -i
0 3185 3184 4002 0 31 0 275060 1056 - Ss 84c54b2c ttys000 0:00.08 -sh
0 3189 3185 4002 0 31 0 272928 324 - R+ 84c548f0 ttys000 0:00.01 ps -el

This is my iPhone 4. It's nuts... EDIT: "RSS" or the ninth(?) column of numbers is the size of the process in RAM in terms of groups of 4096 bits (I think, may be bytes). Springboard, for example, munches 17.7 MB by its lonesome (or 141.95 MB if it's bytes). Eats up 512MiB pretty quickly.