[Galaxy S II Q&A, Help & Troubleshooting] ehsan453:
It's not a task killer. It's an app that modify your lmk and add some tweaks. But you can kill some apps from this app too.

First Plz read reviews in first post and also these two reviews:

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Releasing RAM With Autokiller Memory Optimizer

Have you ever wished to speed up your Android, but now known how? Have you tried task killers, but found it hard to tell whether you made an improvement? In this post, we’ll look at Autokiller Memory Optimizer, an app that gives you more control over how Android releases its system resources.

“You shouldn’t be using a task killer with Android” clearly explains why the task killers are not a good solution to fasten up your system in the Android interface. Briefly, we might say that the reason that task killers are no good for Android is that the same system regulates itself for releasing RAM memory. Process are not killed when you close the app; instead the process stays open until the system itself realizes it needs more memory to run a new process. This way, you can actually gain some speed when you restart the app, as its resources may still be in memory.

Just like a computer, a smartphone uses Random Access Memory (RAM) for processing the functionality of softwares and apps. When you are running low on RAM, your phone will start to slow down, because it needs more memory than is available. As a solution to this problem, Android devices has an autokiller that automatically shuts apps down when the memory used is close to the limit. Obviously this limit depends on the capabilities and configuration of your phone.

If you root your phone (and I totally recommend you to do that) you can use apps for changing your system parameters like the RAM auto killing. One of this apps is Autokiller Memory Optimizer available on the Android Market.

As the developer says: “AutoKiller Memory Optimizer is designed to fine-tune Android system’s inner memory manager routines to keep your device fast and smooth. It also features a full-powered process manager which lets you control your whole system.”

Warning: Messing around with system configurations like this is potentially dangerous to your phone, and not for the faint-hearted! Check out our other How To articles for safer tips on improving performance.

Going for It

The system itself divides the process into six different types, and here’s where it gets technical. The six types are as follows.

FOREGROUND_APP: This is the process running the current foreground app. We’d really rather not kill it! Value set in system/rootdir/init.rc on startup.

VISIBLE_APP: This is a process only hosting activities that are visible to the user, so we’d prefer they don’t disappear. Value set in system/rootdir/init.rc on startup.

SECONDARY_SERVER: This is a process holding a secondary server — killing it will not have much of an impact as far as the user is concerned. Value set in system/rootdir/init.rc on startup.

HIDDEN_APP: This is a process only hosting activities that are not visible, so it can be killed without any disruption. Value set in system/rootdir/init.rc on startup.

CONTENT_PROVIDER: This is a process with a content provider that does not have any clients attached to it. If it did have any clients, its adjustment would be the one for the highest-priority of those processes.

EMPTY_APP: This is a process without anything currently running in it. Definitely the first to go! Value set in system/rootdir/init.rc on startup. This value is initialized in the constructor, careful when refering to this static variable externally.

For every type of app, the system has a limit of pages (1 page=4 kilobytes) predefined. Autokiller Memory Optimizer allows you to modify this.

For the changes you can make you have the freedom to set as you wish, but there is a lock on the three first types of apps (this can be removed in the Preferences tab) and there isalso a list of presets configuration as follows (the numbers corresponds to megabytes remaining before shutting apps in the last 3 types of apps): Moderate (30, 35, 40), Optimum (40, 50, 60), Strict (60, 70, 80), Aggressive (82, 90, 98), Extreme (150, 160, 170), Ultimate (200, 225, 250) and (a wink from the developer about the TV series) Lost (4, 8, 15, 16, 23, 42).

Autokiller presets

Within these presets, you should try different ones, because every phone has its own RAM capacity and it would not be a good idea to set a killing parameter that is very close to your RAM total capacity as your phone would be killing apps constantly and you wouldn’t be able to use it at all.

Processes list

The app also categorizes the running apps in the six types and you can kill them manually for RAM release in the tab processes and the same occurs with the services in the current tab.

Services list

This app has also a donate version with some more features like the Chuck Norris mode when you can configure the app to use aggressive killing to release memory. It also gives the ability to set a different preset when the screen of the phone is off (this is very useful because when the screen is off you do not need memory to run new apps, but it still consumes battery).

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Tweak your system thanks to AutoKiller Memory Optimizer

Summary

Relax, I’m not trying to fool you into thinking that a task killer is really a tweak. Don’t be fooled by the ‘AutoKiller’ part of the app’s name, focus on the other words instead, because AutoKiller Memory Optimizer will allow you to fiddle around and make a few adjustments. Read on and find out what kind of adjustments I’m talking about, and whether the app is worth your time.

Features & Use

AutoKiller Memory Optimizer is there to help you bring your system up to par by conducting a bit of fine tuning. The app comes with a task manager. Use the task manager to get rid of lagging processes, the logic behind this being that if you’ve got something running that’s not really doing anything useful, but does consume 98% of the CPU as well as a hefty chunk of memory you should really unload energy hoggers. Your system will thank you by running smoothly. The task manager also displays the oom_value for ever app—more details below.

The app allows you to regulate the settings for the OOM killer, the automatic killer integrated in every Android device whose role it is to create more memory space wherever possible. As you know, in the Android world applications are never halted or shut down, they are merely rendered inactive—until the memory pipes up and the Out Of Memory Killer rears its head. But when does memory shortage become critical? And who decides which apps should be banished, and when should this occur? If you want to make these types of decisions yourself take a look at AutoKiller Memory Optimizer.

Android divides running apps into six categories ranging from the app that you’re currently working with to ‘empty apps’ (i.e. apps that you left by hitting the back button at some point). Once RAM space becomes too low the OOM killer will start by banishing said empty apps, and, if need be, continue working its way up. AutoKiller Memory Optimizer lets you decide how much free RAM space is required for your device run smoothly. There are different presettings to pick from (‘moderate’, ‘aggressive’, etc) and you can check out the developer’s website to read up on user experiences.

Bottom line:

AutoKiller Memory Optimizer affords you easy access to essential systems settings, allowing your Android to perform as optimally as possible. How essential this kind of app is is contingent on lots of factors: which device you’re working with, how good the manufacturer’s presettings are and what can be done to adjust them.

Screen & Controls

AutoKiller Memory Optimizer is set up in a very logical way. While high skilled, expert knowledge of Android isn’t essential in order to get the best performance out of the controls, it doesn’t hurt to have some experience. You can find in depth information and details regarding the settings options on the developer’s website, which means that you really don’t need much background knowledge in order to get something out of this app.

If you have a bit of experience you will find that the app’s controls are intuitive; if you’ve never worked with tweaking before I recommend that you give this app a miss.

Speed & Stability

AutoKiller Memory Optimizer is fast, stabil and dependable. I’ve been using the app for just over a month and it hasn’t crashed once so far.