yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] androidkid311:
Trust me I wouldn't make this up. And your right but every time it happened I was no where near my phone. Yeah it was updated to 4.1.1. I've read a review in this thread about his not that smooth as well. I'd say download a few apps and try make it multi-task and let me know.
[Nexus 7 General] alias3800:
Who knows, you could have a defective unit. Probably not though, so maybe your best bet is keep your phone nearby for when it happens again. The only lag I'm willing to admit at this point is the stock keyboard and swiftkey, if you're a speedy typer. However, if you turn off "spell checker" (ridiculous that they haven't fixed it yet), then you should be fine.
[Nexus 7 General] effingpace:
No lag here, try a factory reset, i usually do a factory reset on all my new devices before setting them up.
[Nexus 7 General] androidkid311:
Should of but sent it back for a replacement. Had the screen rising on the left,lagging and mofo random reboots! Gooooosh!! My unit was stressed out lol
[Nexus 7 General] johnjohn25:
My nexus 7 was lagging too, it was after i installed this one app. I uninstalled the app and it would still lag but only on the homescreen. I removed the play store media widget and the lag disappeared. I have about 8 widgets (constantly refreshing) and a live wallpaper and still lag free. If you still have that default media widget, try removing it.

Though I still see lag, mostly when im downloading apps or they're installing but once the app is done downloading/installiung the lag goes away. This same issue happens on pretty much every android device i've ever owned, even happens on my iphone so not a big deal.
[Nexus 7 General] solid009:
I have this issue as well. The two times I noticed it I was browsing with chrome and the scrolling started to lag. I exited the app but I would still have lag throughout the device; it would also not recognize my touch all the time, I would have to click something multiple times. Not sure whats causing it.
[Nexus 7 General] Mrcojocaru:
I'm getting some lag too... Tomorrow I should receive my other unit from Google and ill try them both. It's sad cause my dual core nexus performs better
[Nexus 7 General] MrPhilo:
It lags because of the poor memory (poor i/o). This happened on the Transformer prime, the memory limited the device speed and lags when your either installing an app, uni stalling or transferring.
[Nexus 7 General] MysteriousDiary:
Also don't forget that especially on the first day tons of stuff gets synced in the background. When I setup my new devices the first day is almost laggy for some hours until all syncs are done.

Tegra devices doesn't have the greatest memory bandwith.
[Nexus 7 General] androidkid311:
Yeah thank you! What happened to me! Sooo random... I know my unit isn't a defect.. I just think project butter has a hiccup... opening the app drawer was bad as well then bang..... the lag would go... :-/.
[Nexus 7 General] androidkid311:
Can you let us know how the other unit gets on :)
[Nexus 7 General] h3r3tic:
I been getting a lot of lag after playing any heavy game. N64oid Max Payne shadowgun gta3. I always have to reboot or the tablet is unusable. Its not really lag though its more like the touch screen only works 10 percent of the time you touch it until I reboot. Like if i try to drag an app around the desktop it just keeps dropping like I lifted my finger up. And it does it in any app after even if I kill all in memory. And I had mine since Friday its happened almost everytime.
[Nexus 7 General] lovenokia:
i have been getting so much lag around the os, especially in the stock launcher
[Nexus 7 General] androidkid311:
I know what you mean. Its like quad core my ass lol more like single core. I just sent mine off for a replacement. I hope the new unit I get soon is better or Google has some coding and explaining to do --_--.
[Nexus 7 General] mi7chy:
Not seeing it here with Nexus 7 plugged into wall and switching between the built-in apps and also downloaded apps such Glow Ball, Soulcraft THD Beta, Google Voice, etc.

Are you guys seeing this with it running off of battery (possibly power profile/CPU throttling) or plugged in?
[Nexus 7 General] aidanbree:
Been following this thread for a while now. Only started to get lag on mine a few weeks back. Now it is dreadful...

I have tried:

Uninstalling apps

Switching off sync

Fixing permissions with Rom Manager

Clearing the cache at boot loader

The only thing that seemed to have any impact was clearing the cache however that improvement was short lived. After half an hour or so it was back to the same.

My Galaxy nexus is running the same OS revision and has a lesser processor but is smooth as silk....or butter...

Something is far wrong

Btw, I have never used swift key and I just installed Facebook and it made no difference
[Nexus 7 General] khaytsus:
Is it possible to set the scheduler to deadline on the stock ROM/Kernel? I'm not sure which device to twiddle with, there's tones of "scheduler" entries.

I'm guessing this one but I don't want to screw with stuff without knowing.

/sys/devices/platform/sdhci-tegra.3/mmc_host/mmc0/mmc0:0001/block/mmcblk0/queue/scheduler
[Nexus 7 General] androidkid311:
Out of curiosity...what rom are you running?? :)
[Nexus 7 General] yococs:
definite lag

there's really an issue of lag here,I hope its only a software problem and that the next update would fix this.... but if its a hardware problem..... DAMN that would bring a lot of angry Nexus 7 users out there
[Nexus 7 General] Pete7ate:
Thanks for everyone to share experience.
[Nexus 7 General] davy917:
Definitely has to be software issue because I'm rooted since the day I got it and run customs ROMs. I was shocked to see a thread devoted to lag issues.

Yes devices should run smooth out of the box but if you own a nexus device it is begging to be rooted!

Needless to say I'd recommend running custom ROMs and kernels if you're dealing with lag but love the device.. Ive never experience lag and im a very heavy user
[Nexus 7 General] aidanbree:
Completely stock but rooted. The only thing I have tinkered with is the mail client which I applied the Exchange policy unlock - Which I have running on another phone (not Nexus) without issue
[Nexus 7 General] androidkid311:
I would use a custom kernel there are some good ones out which may help you. But the only real permanent fix...is from Google. This seems like a really rushed products. But have a look at this thread as well and see if it can help you. http://xdaforums.com/showthread.php?t=1855100 keep us updated! :)
[Nexus 7 General] yalouf:
I've got my Nexus 7 for 1 week now and since 2 days, i've got lags here and there.

It started to notice it with Greader Pro app, i have a lot of threads to sync, and out of nowhere it started to lag. I uninstalled cleared cache and everything, but it couldn't help the lags. The app is working properly on my Gnexus.

At the same time my sd card had 1 or 2gb left.

Then the stock web browser started to lag (using paranoid android), so i installed chrome (that i use to find slower at the beginning) afterwards which worked even now flawlessly...

Tonight i'll wipe everything, and see what happens. It reminds me the old /datadata full on my SGS i9000...

edit : And btw, i have abyssimal IO bench performance...
[Nexus 7 General] R1ptide:
Anyone having lag issues they can't get rid of please try this:

1. Before doing anything run androbench and record your scores as they are now.

2. Perform a factory reset from within the settings menu. Keep in mind this will erase the SD card unlike doing it from recovery.

3. Don't put your stuff back in quite yet, run androbench again and record scores. I'm betting they will be better but not what they should be.

4. Reflash stock images from Google using a toolkit and now run the tests.

5. Report back
[Nexus 7 General] dornier:
I'm down to 1.72GB on my 16GB Nexus 7. It's lagging to the point of getting the "program is not responding.". I usually select "wait" and it works. Hopefully there's a fix in the works from Google.
[Nexus 7 General] ExploreMN:
Its not a storage space thing or a hardware defect thing. Too many have experienced issues with plenty of space and if it were hardware defects, it would be a much more consistent problem and probably much less prevalent. Its software and probably on a level of how it works with Tegra 3 processors. I say this as my Nexus phone is on JB 4.1.1 as well and doesn't have these issues.

I'll bet a patch is in the works.
[Nexus 7 General] axellink:
I had some serious speed issues but only noticed them once I had less than 2gb left. Uninstalled Nova 3 as that's when I noticed the problems with apps not responding etc, and everything is fine again.

Weird....

I'm running total stock with no root etc
[Nexus 7 General] aidanbree:
I have have a theory....check your Wi-Fi keep alive when sleeping setting to always. Might be coincidence but mine starts to behave when set to always and goes back to lag a wee while after setting to never.
[Nexus 7 General] yalouf:
I think the slugginess occured at first when i had like 2gb or so left. Even when i removed apps the slugginess stayed.

I did a factory reset and the Androbench score is standard. I will run it twice a day from now.
[Nexus 7 General] got556:
Same here....I then wiped everything...just short of re flashing the factory image and it hasn't helped. Its my Friday so on my days off I guess I will put this back to full stock and see what happens.

---------- Post added at 05:08 PM ---------- Previous post was at 05:07 PM ----------

That's when mine started. Around 2gb left.
[Nexus 7 General] psycho2097:
strange, i have 150 apps on it, around 8 widgets and 20 folders spread over 3 homescreens, not a fraction of a second worth of lag. stock rooted, apex pro. i have 6gb remaining
[Nexus 7 General] burnduck:
Don't think factory reset is going to resolve the issue permanently.

I've already reset my N7 twice and every time it gave me a speed boot for about 2 weeks and it will slow down agagin.

It does appears to be related to filling up storage space but once the storage slowed down there doesn't seem to be a way to speed things up again.
[Nexus 7 General] no6969el:
After my lag I was super pissed so I rooted and flashed a custom kernel. This fixed all my lag!

Please try it!

Stock rom, and custom kernel. Even chrome is zippy.
[Nexus 7 General] got556:
most of us are on custom roms/kernels/rooted/unlocked when the lag started. At least from what I've gathered.
[Nexus 7 General] no6969el:
I understand but I was pointing out that I was having issues and just by changing the kernel it fixed it. I am still on the stock rom so maybe it's related to the custom roms.. I only have 3 gb left on my device and still no slow down, before rooting and custom kernel the device slowed to a crawl around this point.

I have setup set at 1500 max and 52 min on conservative

I'm using motley kernel ( motley_anykernel_nexus7_1.1.1_GPU520_build_218)

If anything others should test this configuration to see if the problem goes away
[Nexus 7 General] yalouf:
This is the usual results for the device.

I tried on my Gnexus and my Gf GS2 and it is around the same,

Gnexus with Paranoid Android and Franco Kernel :

SR : 24.6

SW : 8.38

RR : 7.9 , 2022IOPS (4k)

RW : 0.29, 75.08 IOPS(4K)

SQlite Insert 22.33 TPS, 13.43s

SQlite Update : 35.76 TPS, 8,38s

Browser : 106.75ms

Market : 666ms :angel:

Camera : 449.5ms

Camcorder : 1657.0ms

My Gnexus has 7gb left and it's been buttery smooth for a while now without any Factory reset.

GS2 results are more or less the same but SR his at 45 with the GS2, and i can feel it when i install stuff, i can do a lot of thing aside.

The stock results of the nexus 7 are generally higher than the other 2.

RW are always low (see anandtech Nexus 7 memory review)

The problem is why after using the internal sd card to some extent, SW and RW become really low, causing all the lags we have...

I'll try to have at least 6gb free all the time for the moment and see what happens...
[Nexus 7 General] mmaestro:
Just came back to this thread after a couple of weeks away. I put a movie and a couple of large games onto my N7, and the lag started up again almost immediately. Switching Twitter and Facebook for Plume and Friendcaster respectively seems to have helped, more so after paying for the apps and ridding myself of the ads.

Most interesting that I noticed, though, is if I see lag appearing, I can go look at my apps from settings, and the storage space used. It'll read ~4GB used (it's not completely consistent) and after a few seconds, drop down to ~2.4GB used. At which point the lag disappears. I seem to get the same effect from turning the screen off and back on again after a few seconds. Now the lag I'm seeing is nowhere near as bad as it was weeks ago before I did a factory reset, but it's still annoying, and on something like DrawRace where you need to draw a smooth line, it's very apparent that when the lag appears basically the touchscreen goes dead and then restarts again, with the input point jumping from point to point. Sometimes that only lasts a fraction of a second, sometimes it can last as long as 3 or 4 seconds. Explains why the most obvious lag symptom (for me) is dropping letters while typing. If the touchscreen isn't accepting input, it isn't accepting input.

My Androbench results are still normal, though.

My gut feeling remains that there's a problem with garbage collection on the storage, and that's why even after freeing up space, the lag persists for a lot of people unless they do a factory reset, which IIRC formats the storage.
[Nexus 7 General] heyodee:
Disable Google current sync

Keep storage @ about 2gb

If rooted, use deadline I/O scheduler

Twitter/ plume/ etc are not heavy hitters on I/O
[Nexus 7 General] Cyanogenmod7.2:
Just use a custom Kernel...
[Nexus 7 General] Undeadllama:
I know people are only trying to help it appears to be taking a long time to figure out the root cause of this issue... but I've been following this thread closely for a while and it seems some posts are descending into suggestions of things which have either been said before or just blurting things out which aren't helpful.

Yes it's a nexus device... but that doesn't mean it shouldn't work properly without putting a custom rom on it/rooting it/custom this that and the other! Obviously most people here are more than willing to do so, that's why they're here, but please provide some evidence that trying these things may make a difference instead of throwing 1 line suggestions at a thread without really thinking.
[Nexus 7 General] dirk1978:
I had mad lag with not responding, chrome unusable, 30 second hangs etc but seemed to have cured it by removing a 2GB mp4 movie from /sdcard/movies and uninstalling a few apps to free up space. I now have 4GB free and it's running fine again.
[Nexus 7 General] beakeroo:
Mine is rooted, everything else is stock. Horrendous lag, ****ing hate this device now tbh. Never had this issue with other androids.

Is this likely a rooting method issue?
[Nexus 7 General] madhad:
I found this video that might possibly help with the lag.

http://www.youtube.com/watch?v=WnJRYTKqnRc

If the above doesnt work, try completely un-installing google currents.

Good Luck!!
[Nexus 7 General] no6969el:
I felt the same exact way right before I decided to put a custom kernel on it. I tell you its night and day. The moment I started running the nexus @ 1.5 and using the new kernel I knew it was running better than when I first got it. I am totally sticking to this recommendation.
[Nexus 7 General] beakeroo:
Which kernel are you running?
[Nexus 7 General] Dennelly:
Lag ?????????? I can't say I've ever experienced lag even after opening like 30 applications all I got was a slow down and maybe a hiccup lol.
[Nexus 7 General] beakeroo:
This isn't just lag, its complete stand still. Nothing responds for several seconds and it lasts for ages.

Is your device rooted?

I just tried using clemyn kernel and the lag is still there at times.
[Nexus 7 General] SlenderKtulu:
I've got 9gbs free, I suffer from no lag. Although I'm running ParanoidAndroid ROM version 1.992 with GLaDOS Kernel v1.0RC2. I also never had lag before I rooted or flashed a ROM.
[Nexus 7 General] androidkid311:
Good to hear but people report lag when storage limit drops to to say 2-3GB left. I was just about to order my second but heard about the 3G so wondering g if I should bother with that.. :-/.
[Nexus 7 General] ExploreMN:
I did this yesterday and so far so good. Normally, especially first thing in the morning, I would get tons of hangs for the first few minutes. Nothing but butter this morning. Thanks!
[Nexus 7 General] mmaestro:
So tablet went totally non-responsive a few minutes ago. Looks like Play Magazines decided to update itself (any idea how to turn this off without freezing the whole app? The settings are sparse, and I've already turned off auto-download), and whatever that was doing just made the tablet completely unusable.

Google really needs to fix this stuff in stock.
[Nexus 7 General] Toast95135:
Very interesting. I have occasional touch issues like a lot of other people and the grounding issue reminds me of something. I have to use an FM transmitter to listen to music in my car, and I've been using it for years with other Android phones. I noticed when I have my Nexus hooked up to it via the headphone jack(and not charging from the car) I get a slight electronic hum/buzz when I touch the screen. None of my other devices has done this, maybe it's related?
[Nexus 7 General] Cleargrey:
Part of this is a hardware issue

I don't know if this has been mentioned and I have only skipped through the thread and done a quick search, so forgive me if this has been spoken about already. The issue most people are facing is probably hardware. It's explained in depth on the Anandtech review, page 6 "NAND and WIFI performance".

http://www.anandtech.com/show/6073/the-google-nexus-7-review/6

Basically, the memory chips are low quality and can suffer badly when read/writing. I say badly, though not as badly as the TF700. This was explicitly the reason I didn't buy the Infinity because I couldn't justify spending that amount of cash on something so beautiful that is severely hampered by something that, for my uses, will hamper me quite a bit. So to put a good spin on it, the Nexus 7 costs less that half the price of the Infinity and has better read/write performance. And my G.Nex is better than both!

So the software/app changes are merely toning down a hardware issue. I'm not going to say "fault" because it was a cost choice by Asus and we know the Nexus 7 is relatively cheap. Why they made a similar choice in the Transformer line is beyond me.

Just turned off all updates for Currents. We'll see how it helps me.
[Nexus 7 General] khaytsus:
I hope Google is looking into this and figuring out what's going on.. I suspect anyone who hasn't seen this yet just simply hasn't seen it yet. I had zero lag, N7 was super fast until a few weeks ago.

When this happens to me, I thought it had something to do with network IO so I started sniffing traffic. Saw news360 and Currents doing stuff, so I removed 360 and disabled sync in Currents. After that I didn't see much, just the device pinging google and doing normal cal/email sync. Most things run pretty good, except seems like all news apps.... Pulse lags a bit but not terribly, Flipboard is _awful_, it pauses every few pages if I'm lucky...

And son of a *****, I was down to 1.8G on my 16G free, so I cleared out 3 gigs, let it sit for a few minutes, then fired up my testcase; Flipboard. Normally Flipboard lags and stutters and wants to be closed constantly, and it ran pretty good.... I guess I'll have to make sure its has 4-5G free at all times. Great....
[Nexus 7 General] beakeroo:
I am in Lag City again. 7gb free. New kernel. Ten minutes to type this.
[Nexus 7 General] dinesh690:
Edit NVM
[Nexus 7 General] MRsf27:
im experiencing some lag when i play "gears and guns" or whatever that game is. No background apps or anything.
[Nexus 7 General] mmaestro:
How does your I/O look?
[Nexus 7 General] Toast95135:
Do you have Currents setup with background data enabled? Same thing with Play Magazines.
[Nexus 7 General] burnduck:
That game is known to lag, not specific to the N7, you can read the comments from other devices.

PS: I have tried to clear the cache of my Chrome and for some reason it game me pretty dramatic improvement today. Pretty sure I tried it earlier it didn't help at all. Might just be an coincidence.
[Nexus 7 General] Kumnaa:
Whoops, wrong thread :(

[edit] however I am also suffering from this lag which did seem to start after I pretty much filled up the 16gb device. I deleted lots of stuff but still no improvement and I'm pretty much too lazy to deal with a factory reset. I'll wait for the next update from google and see if that helps. If not I'll have to start getting more serious :(
[Nexus 7 General] hexxellor:
This is throwing me off. You say this is normal, and I don't doubt you because I have never seen anything much different, but then I see this in Androbench under sequential writes:

Who the heck is getting those insanely high write speeds? Are they faked or did someone do a hardware hack?
[Nexus 7 General] bso44:
Not fake - here's mine:

If you want similar results, see this thread:

http://xdaforums.com/showthread.php?t=1855100
[Nexus 7 General] yococs:
So by these results and changing and tweaking the kernel its safe to say that its not a hardware problem?
[Nexus 7 General] rferrett:
Been following thread for a while but not contributing. My performance "hit the wall" last night and my NX7 became unusable. Factory reset and install making sure I had 4+gb free has made some, but not much difference. Done the currents thing too.

A couple of people have mentioned custom Kernels helping a lot, any particular recommendations form folks in the know?
[Nexus 7 General] keirmccann:
I assume this is the reason I cant download a torrent and use the nexus at the same time.

Leaving torrent as the active window it will max out my net at 2mb/sec, if I use the browser it will drop to around 200k/sec and fluctuate.
[Nexus 7 General] sark666:
I started a thread blaming it on google currents but I realize now I have the dreaded lag bug. I only had 2 gigs free, uninstalled MC3 and Nova 3 and now have 4.8 gigs free. I disabled google currents background sync, no change. I notice the lag in chrome and in apps like pulse. In pulse swiping through stores it freezes sometimes for a second or 2 before going to the next story.

So it seems freeing up space or dealing with google currents doesn't address this. I may install a custom rom/kernel down the road, but we shouldn't be forced to because of this. It was operating perfectly about a week ago but now this started and the usual things don't seem to resolve it.

Unfortunately, looking through this thread, there doesn't seem to be a concrete answer. Is there a cpu monitor app I can install that keeps a log so when I have lag I can go back and see what was spiking the cpu after the fact?
[Nexus 7 General] bso44:
Can't say for sure because I never had any lag in the first place.

---------- Post added at 07:18 AM ---------- Previous post was at 07:16 AM ----------

Question for those experiencing lag - do you guys auto-update your apps? I know that can cause some serious lag.
[Nexus 7 General] laapsaap:
You know what is weird, since I installed XDA dev app on my nexus 7. That is when I started feeling the lag. I have 10gb free. It's the only thing we all have in common here!
[Nexus 7 General] khaytsus:
...no it's not...

Anywho, my N7's lag has gone away since I cleared up to 5gb free. Mostly.

It's still wonky on wifi, sometimes market stuff downloads VERY slow. If I compare against my phone for the same app, phone downloads a few megs in a second or two, done. N7 is showing 100k... 200k... then boom, 1, 2m, done.