Memory increase using app-storage....

Hi!
I'm working on an application that stores pictures in a directory. I was using ApplicationDirectory, which I discovered is a bad practice.
To access my pics, I used to use:
baseDestinationDirPath = "app:/Images". My program uses about 17Mo of memory, runs fast, but will encounter security errors in the future.
If I try to use ApplicationStorageDirectory (I copy files to applicationStorageDirectory):
baseDestinationDirPath = "app-storage:/Images", memory cranks up to 323Mo !!! and the app runs verrrry slowly.
What's the point???
Please help.
Thank you.

Hi Peter,
and thanks for answering. I don't exactly understand what you call "memory share". Maybe I didn't explain my problem right. Let's be more precise:
I've written this app using Air SDK and run it under Vista64. It uses some pics, and user can add some, kind of a gallery to make it simple.
One of my classes accesses thes pics, and performs simple operations (resizing, thumbnail generation, basic treatment,...).
Everything was OK until I decided to use App-storage instead of App directory.(At first, I wasn't aware of the security problems raised by writing ApplicationDirectory).
When I just change one line of code (baseDestinationDirPath = "app:/Images" to baseDestinationDirPath = "app-storage:/Images", the app starts running very slow and memory usage changes from 17Mo to 323Mo! Same problem wether I use a profiler or install and run my app.
I just tried to run both versions under Ubuntu 11.04: same memory problem (+ I get a security-error when trying to write to app-storage...). Under Linux I can't profile it, but my app is MUCH slower...
I really don't understand why using app-storage instead of app can alter performance so dramatically! I guess it shouldn't... I 'm trying to use different profilers to try to understand the problem, but I'm not experienced enough.
Thanks for your help!

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OS X Yosemite Version 10.10.2
MacBook Pro (13-inch, Mid 2012)
Processor 2.9 GHz Intel Core i7
Memory 8 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 1024 MB
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Total Number of Cores: 2
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SMC Version (system): 2.2f44
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"""TestCases for multi-threaded access to a DB.
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##########END PYTHON CODE##################Using the linux command 'top' prior to and during the execution of
the python script above, I noticed that a considerable amount of memory
is used up and never reclaimed when it ends.If you delete the db_home,
however, the memory is reclaimed.
Am I conjuring up the bsddb concurrent db store incorrectly somehow?
I'm using python 2.5.1 and the builtin bsddb module.
Thanks,
Gerald
Message was edited by:
user590005
Message was edited by:
user590005

I think I am seeing what you are reporing, but I need to check further into
the reason for this.
Running your program and monitoring with Top/vmstat before/after the test, and
after deleting db_home is:
BEFORE RUNNING PYTHON TEST:
++++++++++++++++++++++++++
top - 17:00:17 up 7:00, 6 users, load average: 0.07, 0.38, 0.45
Tasks: 111 total, 1 running, 109 sleeping, 0 stopped, 1 zombie
Cpu(s): 3.6% us, 0.7% sy, 0.0% ni, 95.5% id, 0.0% wa, 0.2% hi, 0.0% si
Mem: 1545196k total, 1407100k used, 138096k freeTerminal, 20700k buffers
Swap: 2040212k total, 168k used, 2040044k free, 935936k cached
[swhitman@swhitman-lnx python]$ vmstat
procs -----------memory---------- ---swap-- -----io---- system ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 160 247096 20860 833604 0 0 31 22 527 675 7 1 91 1
AFTER RUNNING PYTHON TEST:
++++++++++++++++++++++++++
top - 17:02:00 up 7:02, 6 users, load average: 2.58, 1.36, 0.80
Tasks: 111 total, 1 running, 109 sleeping, 0 stopped, 1 zombie
Cpu(s): 3.7% us, 0.5% sy, 0.0% ni, 95.8% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 1545196k total, 1508156k used, 37040k free, 20948k buffers
Swap: 2040212k total, 168k used, 2040044k free, 1035788k cached
[swhitman@swhitman-lnx python]$ vmstat
procs -----------memory---------- ---swap-- -----io---- system ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 160 143312 21120 935784 0 0 31 25 527 719 7 1 91 1
AFTER RUNNING PYTHON TEST & DB_HOME IS DELETED:
++++++++++++++++++++++++++++++++++++++++++++++
But I think DB_ENV->close
top - 17:02:48 up 7:02, 6 users, load average: 1.22, 1.17, 0.76
Tasks: 111 total, 1 running, 109 sleeping, 0 stopped, 1 zombie
Cpu(s): 8.8% us, 0.5% sy, 0.0% ni, 90.5% id, 0.0% wa, 0.2% hi, 0.0% si
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Swap: 2040212k total, 168k used, 2040044k free, 934032k cached
[swhitman@swhitman-lnx python]$ vmstat
procs -----------memory---------- ---swap-- -----io---- system ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 160 246208 21132 833852 0 0 31 25 527 719 7 1 91 1
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How can I free the storage on my phone and use the storage on my iCloud?

My phone says I have 5Gb of iCloud storage. I have 4.8Gb free. My phone itself has no more space and when I download it tells me I need to sort out my settings. How can I manage my storage so that is is all saved to my iCloud rather than my phone so that I have memory for new apps or music?

You can't use iCloud to expand the space on your phone. iCloud is designed to sync your data across all your devices, not to save your data to free up space on your device. The only exception to this is if you subscribe to iTunes Match, which would make your iTunes music library through iCloud without having to store it all on your phone.
If you need to free up space on your phone, you'll have to sync something off it to free up space, or import some or all of your photos and vidoes to your computer and delte them from your phone, as explained here: http://support.apple.com/kb/HT4083.

N9 - Installed apps storage full (problems)

1) N9 app storage is 4.2GB. My device shows 3.9 of 4.2GB are used. This means, that 0.3GB are still unused. Nevertheless, I get an error message that I can't install an app because of low memory and I'm advised to uninstall an app first.
2)When I try to uninstall an app, be it from the homescreen (long press, hit x) or from the application menu in Settings, I get two different error messages.
Any recommendations on that bug?
How to enlarge app storage?
Thanks!
Solved!
Go to Solution.
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@deadprincess
Are you filling it with HD games and if you use over 90% of available space you are asking for problems?
Although technically feasible if you are not an experienced Linux user and haven't repartioned live linux ext4 filesystems before, then most likely you will fail upon N9 if this is your first attempt at doing so.
Also be warned that there will be problems with reflashing device in future, if the size of the partition does not match the size of the flash image!
Happy to have helped forum with a Support Ratio = 42.5

On my iPad I have got a lot of "other" memory being used (18gb) why? I can't see anything on there!

On my iPad I have got a lot of "other" memory being used (18gb) why? I can't see anything on there!

How Do I Get Rid Of The “Other” Data Stored On My iPad Or iPhone?
http://tinyurl.com/85w6xwn
With an iOS device, the “Other” space in iTunes is used to store things like documents, settings, caches, and a few other important items. If you sync lots of documents to apps like GoodReader, DropCopy, or anything else that reads external files, your storage use can skyrocket. With iOS 5, you can see exactly which applications are taking up the most space. Just head to Settings > General > Usage, and tap the button labeled Show All Apps. The storage section will show you the app and how much storage space it is taking up. Tap on the app name to get a description of the additional storage space being used by the app’s documents and data. You can remove the storage-hogging application and all of its data directly from this screen, or manually remove the data by opening the app. Some applications, especially those designed by Apple, will allow you to remove stored data by swiping from left to right on the item to reveal a Delete button.
 Cheers, Tom

Memory increase using app-storage....

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