[Tutorial] ROMs & Sysctl.conf & other tweaks!

[Inkarnit]

Well you guys have certainly run away with this and the options I'm a subscriber to simple. I want the best performance with the least amount of babysitting. I don't want to use Tasker or cache cleaners or anything of the sort. I posted these much earlier in the thread (first couple pages?) but I'll reiterate and include my results:

vm.min_free_kbytes = 2048
vm.dirty_ratio = 95
vm.dirty_background_ratio = 60
vm.vfs_cache_pressure = 50
vm.kill_oom_allocating_task = 1

My phone has now been booted for 58.5 hours without a slowdown. This battery charge is closing on 2.5 hours in and still showing as 100%. I think simple is better

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[macpro88]

Well you guys have certainly run away with this and the options I'm a subscriber to simple. I want the best performance with the least amount of babysitting. I don't want to use Tasker or cache cleaners or anything of the sort. I posted these much earlier in the thread (first couple pages?) but I'll reiterate and include my results:

vm.min_free_kbytes = 2048
vm.dirty_ratio = 95
vm.dirty_background_ratio = 60
vm.vfs_cache_pressure = 50
vm.kill_oom_allocating_task = 1

My phone has now been booted for 58.5 hours without a slowdown. This battery charge is closing on 2.5 hours in and still showing as 100%. I think simple is better

Very nice, I ran these settings for a while too, with great results as well. Trying the pressure on 1 and having Cache Cleaner NG (which has a scheduler built in so you don't have to mess with it) should hopefully work out nicely without having to reboot for a while, and should have good battery life as well.

And as for my Market FC problem, Market still works.... still I will put this on the back burner for while.
But thank you guys for your suggestions.

Also, I noticed that Liberty does not have a built in battery manager where you can change the settings? I am assuming this was a blur element. Any suggestions on an app that does a great job at managing the battery like the stock one?

[WugFresh]

I use tasker, but Juice Defender can adjust similar settings.

@Inkarnit
What's your opposition to Tasker or Cache cleaners?

{{ WugFresh }}

[macpro88]

I use tasker, but Juice Defender can adjust similar settings.

@Inkarnit
What's your opposition to Tasker or Cache cleaners?

{{ WugFresh }}

Wow, Tasker is expensive lol, if it is like the free version of Juice Defender, I will likely consider it, trying out Juic Defender right now to see how things improve.

[Inkarnit]

I use tasker, but Juice Defender can adjust similar settings.

@Inkarnit
What's your opposition to Tasker or Cache cleaners?

{{ WugFresh }}

No true opposition, as I've not used either. I just don't want to have apps to control what I'm doing. I have my phone set up pretty well through what I do have. Adding more stuff seems counterproductive to me. I don't need to change settings for different times. With my sysctl tweaks coupled with Autostarts to stop the BS apps from starting on their own, I don't see any need to mess with things. My phone runs very fast, scoring around 1500 on quadrant without any overclocking, has a battery that lasts longer than I ever need it, and a cache that apparently doesn't need a reboot except MAYBE once a week. I don't even know if it needs it that much. I've got things pretty much in the money spot. What can Tasker or cache cleaners do for me?

[Marius]

I agree simple is better for most people, but if you're a OCD tweaker like me I need to push my phone to its limits!

I think the important thing is that the folks simply at least just turn on sysctl in their liberty settings. Liberty 1.0 ships with stock rom kernel settings, and they can be less than ideal in terms of battery life or performance.

Btw, before the tweaks my phone used to reboot daily, but now it's been up for over 4 days straight!

# uptime
16:33:59 up 4 days, 2:06, load average: 0.87, 0.26, 0.22
#

So reliabilty has gone up as well!

As for Cache Cleaner NG, i'm not sure which cache it's actually cleaning. Would be nice to get some sort of technical explanations. There are different types of caches. The vfs_cache_pressure settings affect file system cache only (dentry/inodes), and the dirty_* settings affect block cache. I suspect it may clear application caches only which is not what we're looking for here.

[BadMedicine]

I ran these settings for a day:

Min KB free: default
Dirty Background Ratio: 90
Dirty Ratio: 90
VFS cache pressure: 10

I had 2 random reboots while the phone was on these settings. I'm confident that the Dirty Background caused the problem. Battery life was about as it was on default settings.

I'm now at:

Min KB free: default
Dirty Background Ratio: 70
Dirty Ratio: 90
VFS cache pressure: 20

Been running this for the last 2.5 days and have seen great results. Battery life increased after the first day. The second day after a full charge I'm at 70% after 19 hours. No slow downs, reboots, or FC's.

[Marius]

I ran these settings for a day:

Min KB free: default
Dirty Background Ratio: 90
Dirty Ratio: 90
VFS cache pressure: 10

Whoa dirty_background_ratio = dirty_ratio = 90 is very dangerous! You're basically telling the kernel not to flush any data to disk until you have less than 10% of memory free, at which point all processes requiring I/O will be blocked to wait for I/O. And then your processes will start piling up, hanging, things just get in a bad shape. Nothing to do with Liberty, it's just how linux works.

[WugFresh]

@Inkarnit
Well with Marius's point about cache cleaners, I am begining to second guess my logic about using them, running a script to clear system cache is really what I should be doing; I think Marius is right and cache cleaners just clear app cache. Rebooting obviously is a substitute for automating a system cache clear, since system cache is always flushed when there is no power source. So I need to revise my approach.

However, I think Tasker is a must have. If your outlook is 'simple is better' then I think tasker is for you. Well... if you define 'simple' the way I do. I consider it to mean, unattended/without user interaction; set my tasks up once and have my phone do everything I want it to automatically; less user interaction means increased productivity, not counter-productivity. Here are some examples of things I have made tasker do:

When I start Maps, GPS initiates and then shuts off when I exist.

When I plug in my headphones, volume increases, Pandora starts

When a good WiFi connection is detected my device turns on WiFi connects and turns off 3G.

When I plug my device into my charger, autosync initiates

When I open 3G hotspot, autosync is disabled.

When I physically move my phone using various gestures it launches different apps, or tasks.

Literally, tasker does anything you want it to.. anything you can think of.

In context to this thread about sysctl.config edits, if I can use tasker to clear system cache and therefore have the opportunity to push my phone to the limit, via cache pressure = 1, then that is already one great example of utilizing Tasker for a great benefit. And is "simpler" then rebooting so to speak... if you don't factor in the time to make the tasker profile to begin with.

@macpro
Tasker does everything which is why it can also do what Juice Defender does, but not vise versa. Tasker is worth every penny, in fact I consider it to be a bargain considering how many apps I have replaced with it.

{{ WugFresh }}

[BadMedicine]

Whoa dirty_background_ratio = dirty_ratio = 90 is very dangerous! You're basically telling the kernel not to flush any data to disk until you have less than 10% of memory free, at which point all processes requiring I/O will be blocked to wait for I/O. And then your processes will start piling up, hanging, things just get in a bad shape. Nothing to do with Liberty, it's just how linux works.

Yeah I was aware that it would be unstable, I was just giving it a try for the heck of it. I know it's not Liberty's fault, I'm just playing around and seeing what's good.

Also, You guys are worried about clearing the cache and cache cleaners. In Liberty Settings there is an option to clear cache/fix permissions on bootup. I have these options checked. Question: which cache(s) is it clearing?