Hello guys i would like to ask what is a dalvik cache because i want to install this ROM For My Samsung Galaxy Y
Code:
http://forum.xda-developers.com/showthread.php?t=1602299
If you want to know what it is you can search Google or Wikipedia:
http://en.wikipedia.org/wiki/Dalvik_(software)
As far as installing ROMs go its recommended to clear the davlik cache each time you install a new ROM. On most android phones this is done from within Clockworkmod.
As far as installing ROMs go its recommended to clear the davlik cache each time you install a new ROM. On most android phones this is done from within Clockworkmod.
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How do i do it in Clockworkmod. Would you kindly give me some instructions?
rara23 said:
How do i do it in Clockworkmod. Would you kindly give me some instructions?
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Click to collapse
Boot into CWM recovery, it should be under the "wipe". Look for "wipe dalvik-cache" option
Or under the tab: Advanced
Dalvik-cahce
Ive always somewhat wandered what the dalvik cache was never really bothered to look into it. but now i have its nice to know that when i wiped the cache each time i flashed a new ROM it was for good reason. Thanks
spunker88 said:
If you want to know what it is you can search Google or Wikipedia:
http://en.wikipedia.org/wiki/Dalvik_(software)
As far as installing ROMs go its recommended to clear the davlik cache each time you install a new ROM. On most android phones this is done from within Clockworkmod.
Click to expand...
Click to collapse
It does not mention the cache
Am i wrong to assume it's a bitcode of everything dalvik ever run/saw installed?
gcbxda said:
It does not mention the cache
Am i wrong to assume it's a bitcode of everything dalvik ever run/saw installed?
Click to expand...
Click to collapse
Search for what the cache is, read the Dalvik then link them together.
I was getting out of space on my internal phone, so I decided to clear wipe cache and dalvik cache through CWM, but I find i save a lot of space BUT some apps stop working, maybe they are lost. So was does this actually do? Why are the apps there, but can't work? :crying:
Ok, after rebooting they are actually working again, i didn't even lost any data (progress on games) but I am really concerned what does this really do??
rolo143 said:
I was getting out of space on my internal phone, so I decided to clear wipe cache and dalvik cache through CWM, but I find i save a lot of space BUT some apps stop working, maybe they are lost. So was does this actually do? Why are the apps there, but can't work? :crying:
Ok, after rebooting they are actually working again, i didn't even lost any data (progress on games) but I am really concerned what does this really do??
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Click to collapse
http://en.wikipedia.org/wiki/Dalvik_(software)
When you reboot, Dalvik cache and Cache are re-created. So no space saved this way.
Feanor88 said:
http://en.wikipedia.org/wiki/Dalvik_(software)
When you reboot, Dalvik cache and Cache are re-created. So no space saved this way.
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Click to collapse
I was wondering what wiping the Dalvik cache did, too. I installed an inverted app and someone told me I needed to wipe the Dalvik cache in order for it to remain in place after a reboot, so I did that. Now my phone says "Optimizing apps..." It must rbe e-creating the cache.
As far as I know, when a rom boots up for the first time Dalvik goes through each & every apk's & extract the Dex & put it in the cache. So probably it is a location of all apks. If dalvik cache is not wiped after a new rom is installed,dalvik cache will skip because it founds the dexed cache files attach to the directory. The result is "Force close" issues.
So wiping dalvik cache can be done without any problem many times within the same rom & that's why is shows "optiming apps" after a dalvik cache wipe.
saqib nazm said:
As far as I know, when a rom boots up for the first time Dalvik goes through each & every apk's & extract the Dex & put it in the cache. So probably it is a location of all apks. If dalvik cache is not wiped after a new rom is installed,dalvik cache will skip because it founds the dexed cache files attach to the directory. The result is "Force close" issues.
So wiping dalvik cache can be done without any problem many times within the same rom & that's why is shows "optiming apps" after a dalvik cache wipe.
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Thanks! That's in line with my suspicion, except I didn't know when I posted my question that an apk file was nothing but a zip file that contains a dex (Dalvik executable) and a bunch of other files. Your explanation makes sense. I also noticed that if I install an individual app from a zip file using CWM Recovery, then it clears the relevant part of the Dalvik cache for me. That doesn't happen when I install an apk file directly using Root Explorer.
guys one line question i am performing "Wipe cache and dalvik-cache" will my phone internal memory be deleted ? thanks a ton
deepankarbu said:
guys one line question i am performing "Wipe cache and dalvik-cache" will my phone internal memory be deleted ? thanks a ton
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Click to collapse
Nop, it will not
Sent from my SK17i using xda premium
Phone didn't boot after wiping Dalvik Cache
Hi Geeks
i have an Xperia Arc S modded with Cyanogenmod JellyBean 4.1.2 Cooked ROM
i had alot of memory issues as applications keep closing whenever system runs out of memory, it is always obvious in the DSP application with the walkman in addition to visualizations inside the walkman
i searched for a solution and some told me that wiping the dalvik cache might solve the problem, so i gave it a try and rebooted in CWM recovery mode "built inside ROM" , cleared the Dalvik cache , and the phone keeps displaying the Xperia Logo without any further progress, as if it's in somekinda loop !
any idea what to do next without wiping my Data ? thank you all
BR
AMR
Koptanov said:
Hi Geeks
i have an Xperia Arc S modded with Cyanogenmod JellyBean 4.1.2 Cooked ROM
i had alot of memory issues as applications keep closing whenever system runs out of memory, it is always obvious in the DSP application with the walkman in addition to visualizations inside the walkman
i searched for a solution and some told me that wiping the dalvik cache might solve the problem, so i gave it a try and rebooted in CWM recovery mode "built inside ROM" , cleared the Dalvik cache , and the phone keeps displaying the Xperia Logo without any further progress, as if it's in somekinda loop !
any idea what to do next without wiping my Data ? thank you all
BR
AMR
Click to expand...
Click to collapse
Are you sure you only wiped the dalvik?
Sent from Myushi
clears app cache
rolo143 said:
I was getting out of space on my internal phone, so I decided to clear wipe cache and dalvik cache through CWM, but I find i save a lot of space BUT some apps stop working, maybe they are lost. So was does this actually do? Why are the apps there, but can't work? :crying:
Ok, after rebooting they are actually working again, i didn't even lost any data (progress on games) but I am really concerned what does this really do??
Click to expand...
Click to collapse
it clears the app running cache stored in os.
absolutely ..
XperienceD said:
Are you sure you only wiped the dalvik?
Sent from Myushi
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Click to collapse
Yes sir it's only the dalvik cache, both ways this ROM was pretty heavy and i'm not satisfied with the reboot every 2 or 3 hours of use, i will install xperia ultimate HD ROM, they say it's pretty stable and has no problems, and it has the sound enhancements i needed in the Jellybean cooked ROM
thanks for your reply
alcatel 918n
XperienceD said:
Are you sure you only wiped the dalvik?
Sent from Myushi
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Click to collapse
My phone also has those options built-in. If you did the dalvik only it should get back to where you have the icons. BUT, if you did something else aside from the dalvik, my guess would be goodbye data and hello to phone repairs. Please research first before you do anything on your phone. Your phone and my phone have very powerful built-in tools. It could brick the phone. I hope you did not wipe data and flash.
help! my phone's boot taking too long
i wiped /cache and dalvik cache and format /cache. it's taking took long. been waiting for almost 1 hour.
Lucky Patcher Dalvik-cache
I am getting out of space msg when using Lucky Patcher.....apk will be patched on boot......it says to clear dalvik cache to save space.....is this a good idea(will I loose any data from game etc?) or this a issue with lucky patcher?
Clearing Dalvik
Feanor88 said:
When you reboot, Dalvik cache and Cache are re-created. So no space saved this way.
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Click to collapse
Um, that would involve the re- "optimization" process at each boot. Depending on the number of apps you have installed, this process can take an hour.
Simply put, the Dalvik cache is where a virtual machine program (like VMware Player, Workstation or Fusion or MSVM) called "Dalvik" stores information the applications on your device request it to. This storage is for the purpose of making app load times shorter, but because it's all low-level stuff, it has to be loaded prior to the AndroidOS frontend...Fortunately, this cache only needs to be rebuilt when a flag has been set indicating the need, which is set whenever the cache is cleared. Note the distinction between "loading" and "rebuilding" this cache. "Load" is synonymous with "read" and "rebuild" means "write." So time-wise it is the distinction in effort between reading a book and writing one.
Typically I only clear it for troubleshooting reasons; if something is not working. The latest Cyanogenmod has a major problem where the desktop data is liable to randomly corrupt.
Typically, the only solution is a Dalvik wipe in CM or whatever. If you have recently installed a large number of apps(over twenty)then it might be best to clear the cache via recovery at the next cold boot, especially if your device does weird stuff like getting hot, discharging while plugged in to the OEM charger, widgets crash spontaneously, wallpapers are replaced by defaults, etc....Some of these symptoms can also indicate a virus or malware infection,(especially on custom ROMs or rooted devices) so diagnosis is differential.
But essentially there is no harm in re-building the Dalvik cache, other than the time taken to do so.
Koptanov said:
Yes sir it's only the dalvik cache, both ways this ROM was pretty heavy and i'm not satisfied with the reboot every 2 or 3 hours of use, i will install xperia ultimate HD ROM, they say it's pretty stable and has no problems, and it has the sound enhancements i needed in the Jellybean cooked ROM
thanks for your reply
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Click to collapse
CM has this new MAJOR stability issue, it seems. The random crashes and reboots will soon combine(if they haven't already)with the deletion of your desktop customizations and your widgets will begin vanishing forever. Not even a full wipe and rebuild will bring them back.
Been using AOKP on Nexus 7 2013 for a month now. It is based on CM, but it is way more stable.....haven't needed to re-boot in two weeks! Uptime, baby!
UPDATE 04/05/2014: Been running without rebooting for over a month, now. AOKP is definitely WAY more stable than any other ROM I've used.
Dalvik explained
Saqib Nazm said:
As far as I know, when a rom boots up for the first time Dalvik goes through each & every apk's & extract the Dex & put it in the cache. So probably it is a location of all apks. If dalvik cache is not wiped after a new rom is installed,dalvik cache will skip because it founds the dexed cache files attach to the directory. The result is "Force close" issues.
So wiping dalvik cache can be done without any problem many times within the same rom & that's why is shows "optiming apps" after a dalvik cache wipe.
Click to expand...
Click to collapse
There is a full explanation of the dalvik cache on wikipedia.
The wiki entry fully explains dalvik cache and the integral part it plays in your android system. In very simple terms, it is a cache that allows the system to talk to the exe of a program without the need to load the cache on each and every start. The dalvik is is loaded once, and then never again (unless you wipe the dalvik cache, in which case, it is rebuilt upon reboot). There is no affect on any given program when the dalvik cache is wiped, other than starting slower the first time it is started after the wipe.
Related (I think) - Samsung Galaxy S5 running CM 12.1 latest nightly (6-14). I started on CM 12.0 nightlies in March or April and transitioned to 12.1 within a day or two acter it showed up. That was a relatively noticeable transition requiring new gapps and a factory reset as I recall. I read somewhere that wiping cache and dalvik cache was unnecessary between one 12.0 nightly to another and between one 12.1 nightly to another, so I typically have not performed the cache and dalvik wipe during nightly upgrades, of which I've probably done 30 or 40 since I started on 12.0. After each nightly update flash, when I ask TWRP to reboot the system, without wipes, all my 160 or so apps are optimized, taking some time, before the noot is compete. This morning out of curiosity, after the nee ROM was flashed, I chose the option in TWRP to wipe the cache and dalvik cache before I askefasked TWRP to reboot the system. The wipe process took at least as long to complete as a typical optimization, and when I rebooted, I still got the lengthy optimization. So I'm tbinking either there's no relationship berween app optimization and wiping the caches, or CM and/or TWRP automatically wipes the caches whether I do or not.
---------- Post added at 12:58 PM ---------- Previous post was at 12:54 PM ----------
Please forgive typos in my previous post - SwiftKey or something is making proofreading and editing difficult today.
Not the exact answer, but may interests u.
Koptanov said:
Hi Geeks
i have an Xperia Arc S modded with Cyanogenmod JellyBean 4.1.2 Cooked ROM
i had alot of memory issues as applications keep closing whenever system runs out of memory, it is always obvious in the DSP application with the walkman in addition to visualizations inside the walkman
AMR
Click to expand...
Click to collapse
Hi, I do not have the exact answer. But I wanted to share my own observation. When I wipe dalvik caches through CWM recovery, I find my phone taking a long time to finish booting every time. Sometimes I thought it would not boot up, I removed the battery and tried to swith on and my phone boots up. I do not know why it happens, may be I had installed a large no of apps.
I've got Nexus 5 with bootloader unlocked , after few weeks security patch arrived and after the phone switched off and showed error symbol and when I entered recovery mode it showed that error in system/bin.sh files need some help here
I want to move from stock odex ROM to a deoxed version. I am currently running odex rooted stock OTA 1.22.651.3 (from xHaus). Can I flash the deodexed ROM over mine without wiping? I know that I can TI Backup all of my apps if I need to wipe, but it would be simpler to flash over if possible.
Thanks.
tamas413 said:
I want to move from stock odex ROM to a deoxed version. I am currently running odex rooted stock OTA 1.22.651.3 (from xHaus). Can I flash the deodexed ROM over mine without wiping? I know that I can TI Backup all of my apps if I need to wipe, but it would be simpler to flash over if possible.
Thanks.
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Click to collapse
What's wrong with wiping and flashing if your apps are backed up? You will be in a world of hurt if you don't.......skies will fall, unicorns will die.....lol just force closes etc....so wipe .
Sent from my Transformer Prime TF201 using Tapatalk 2
There really is no reason not to wipe data when flashing a Rom. Really Bad idea not to.
Sent from my EVO using xda premium
neopolotin75 said:
What's wrong with wiping and flashing if your apps are backed up? You will be in a world of hurt if you don't.......skies will fall, unicorns will die.....lol just force closes etc....so wipe .
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Things like contact linking are a pain to get right. There isn't a major problem with wiping; I was just asking to try to save myself some trouble if it was possible.
Wipe it is.
if your wanting to save yourself some trouble then always do a factory reset, wipe cache and dalvik cache. just a good way of making sure you always get a clean install. thats what i always do. and especially if im home on my wifi cuz all my apps and such download in about 3-4 mins and ur good.
tamas413 said:
Things like contact linking are a pain to get right. There isn't a major problem with wiping; I was just asking to try to save myself some trouble if it was possible.
Wipe it is.
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Click to collapse
Something like this was what I was about to say.
jsonger121 said:
if your wanting to save yourself some trouble then always do a factory reset, wipe cache and dalvik cache. just a good way of making sure you always get a clean install. thats what i always do. and especially if im home on my wifi cuz all my apps and such download in about 3-4 mins and ur good.
Click to expand...
Click to collapse
You're not saving yourself trouble, You're creating potential head aches in the future by not wiping. I always do a full wipe and I only use TB to restore a few apps like games that I don't want to lose data from. It takes a little longer but you'll have far less issues in the end. I'm convinced the majority of the issues people have in these rom threads are from just flashing without wiping anything and/or using TB to restore all apps + data.
Hey folks! Quick stupid question that most of you will say "answered many times before, use the search" to:
What are the exact steps to flash a new radio? I have an MB860 running CM7-MROM connected to the Bell Canada network in Toronto, and every time an app tries to access the GPS, the data connection dies, and I have to reboot to get the data/H+/3G back. I read that someone else had the exact same problem, and fixed it by flashing "N_01.77.33P_can_bell.zip". My phone says it is currently running "N_01.07.05P" (under Baseband version).
I am assuming that I can use this radio because it says "bell canada" in the filename, but how exactly would I go about flashing it? I searched the forums, and some people are saying to use CWM to "install zip from sdcard" just like I would when I update MROM, while others say to first "wipe cache" <- what cache are they talking about? The dalvik cache?
Thanks for your help!
There is the "cache" partition too, you know...
You won't find any detailed instructions on how to flash radio since it is EXACTLY the same as flashing a ROM.
ravilov said:
There is the "cache" partition too, you know...
Click to expand...
Click to collapse
Yes, I know, that's why I'm asking which cache they are telling me to wipe.
ravilov said:
You won't find any detailed instructions on how to flash radio since it is EXACTLY the same as flashing a ROM.
Click to expand...
Click to collapse
Well I've found lots of detailed instructions, but some are saying to install it exactly like you would when flashing a ROM update (don't wipe any cache), and some are saying to "wipe cache" without specifying which cache.
moeburn said:
Yes, I know, that's why I'm asking which cache they are telling me to wipe.
Well I've found lots of detailed instructions, but some are saying to install it exactly like you would when flashing a ROM update (don't wipe any cache), and some are saying to "wipe cache" without specifying which cache.
Click to expand...
Click to collapse
Normally its wipe both. Easier way is extract the radio.img, make sure its called radio.img, fastboot flash radio radio.img
Sent from my MB860 using xda app-developers app
The /cache partition holds a part of dalvik-cache, so when you wipe /cache, you wipe a part of dalvik-cache too. (The other part is on /data.)
I'm not quite sure why so many questions about it though. If unsure, just wipe all the caches you come across. By definition, a "cache" is something that holds temporary information which can be easily rebuilt, so there's no harm in wiping it. You're just making it unnecessarily complicated...
ravilov said:
The /cache partition holds a part of dalvik-cache, so when you wipe /cache, you wipe a part of dalvik-cache too. (The other part is on /data.)
I'm not quite sure why so many questions about it though. If unsure, just wipe all the caches you come across. By definition, a "cache" is something that holds temporary information which can be easily rebuilt, so there's no harm in wiping it. You're just making it unnecessarily complicated...
Click to expand...
Click to collapse
Welp, apparently the people telling you to wipe the cache are making it unnecessarily complicated too, because I flashed the new radio ROM without wiping any cache, and it worked just fine!
And OH MY GOD I had no idea my Atrix could get a GPS lock so fast! It locks in under 5 seconds, EVERY TIME now! It used to take 2-5 minutes, it took so long that if I wanted to GPS track my ride, I'd first turn on the GPS mapping app and put the phone out on the patio table, and let it get a fix while I got ready to leave.
And best of all? I can use data/H+/3G AT THE SAME TIME as GPS! It used to be that as soon as an app started the GPS, the data connection died, and I had to reboot to get it back. Now I can actually use my phone like it was designed!
hello actually i am intending with xda developers forum and using custom rom for almost 8 years. but the problem is i never know what does that wipe methods do. until now i just fallowed the instructions but i think i need to know .
i have 2 main questions.
1-) what are this wipe processes do (exacly what are they wiping)
a-)Wipe Data/Factory Reset
b-)Wipe Cache Partition
c-)Wipe Dalvik Cache
please give me proper explenation for each .what are they wiping ? and why we using them for ?
2-) A proper cleaning on my android device. as much as i use my device there is junk files, cropses and all other unnecessary files rolling up in times. so this is very disturbing. and i want to have a blank page only with my rom and my karnel + bootloader etc files i don't want anything more.
so question is this. what should i do to clean my device as this clean like having nothing except basic things ?
if any of you explaint this 2 questions for a dumb user i hope it will be very helpfull also other newbie android users. or the people like me ignorant for 8 years shame of myself
anyway thank you for your help and interests.
Quayron said:
hello actually i am intending with xda developers forum and using custom rom for almost 8 years. but the problem is i never know what does that wipe methods do. until now i just fallowed the instructions but i think i need to know .
i have 2 main questions.
1-) what are this wipe processes do (exacly what are they wiping)
a-)Wipe Data/Factory Reset
b-)Wipe Cache Partition
c-)Wipe Dalvik Cache
please give me proper explenation for each .what are they wiping ? and why we using them for ?
2-) A proper cleaning on my android device. as much as i use my device there is junk files, cropses and all other unnecessary files rolling up in times. so this is very disturbing. and i want to have a blank page only with my rom and my karnel + bootloader etc files i don't want anything more.
so question is this. what should i do to clean my device as this clean like having nothing except basic things ?
if any of you explaint this 2 questions for a dumb user i hope it will be very helpfull also other newbie android users. or the people like me ignorant for 8 years shame of myself
anyway thank you for your help and interests.
Click to expand...
Click to collapse
A. Wiping data/factory reset completly erases whats in /data,
Your apps, dalvik cache, app data and many others are wiped, but those i listed are the most relevant
With certain devices internal storage can be wiped such as Xperias because /data/media is where the internal storage is mounted however this is typically avoided with the recoveries we have
2. Wiping cache, the cache is typically used to store information or app data that isnt permanent however that can cause crashes or other kinds of issues after a mod instalation
3. Dalvik/art cache is used to store decompiled readable versions of the android apps installed meaning it can launch the app much quicker however if you dont wipe this, it can cause much more issues after installing a app mod lets say
Envious_Data said:
A. Wiping data/factory reset completly erases whats in /data,
Your apps, dalvik cache, app data and many others are wiped, but those i listed are the most relevant
With certain devices internal storage can be wiped such as Xperias because /data/media is where the internal storage is mounted however this is typically avoided with the recoveries we have
2. Wiping cache, the cache is typically used to store information or app data that isnt permanent however that can cause crashes or other kinds of issues after a mod instalation
3. Dalvik/art cache is used to store decompiled readable versions of the android apps installed meaning it can launch the app much quicker however if you dont wipe this, it can cause much more issues after installing a app mod lets say
Click to expand...
Click to collapse
so is there a way to clean my leftover media/data/etc.. in internal storage withouth touching rom files ?
Quayron said:
so is there a way to clean my leftover media/data/etc.. in internal storage withouth touching rom files ?
Click to expand...
Click to collapse
Your ROM is in /system so wiping data doesn't affect the system its self
You can wipe data but that wipes dalvik cache
Its probably better to wipe caches with a data wipe
Quayron said:
so is there a way to clean my leftover media/data/etc.. in internal storage withouth touching rom files ?
Click to expand...
Click to collapse
thank you so much.