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• Help with saving or adding more than 4000 words to a list in memory in C#.net

  - by Jepe d Hepe

  I need help with my application where i save a bunch of words like more than 4000 words or more in a List<[class name]. My problem is, as the number of words increases, the process in saving it in the list seems to go slower and the application uses a lot more of memory. Can you give me an advise or alternative to do this without affecting the speed of the process?

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• Is Cassandra database row size limited by available memory?

  - by Adam Hollidge

  I'm working with very long time series -- hundreds of millions of data points in one series -- and am considering Cassandra as a data store. In this question, one of the Cassandra committers (the über helpful jbellis) says that Cassandra rows can be very large, and that column slicing operations are faster than row slices, hence my question: Is the row size still limited by available memory?

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• How to have that file system in the flash memory itself?

  - by sagar

  Hi, we are doing a flash boot, with an NFS driver from a host machine mapped as the root directory. How to have that file system in the flash (flash memory ) itself in linux environment ?

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• Will the memory rise if I loads a same URL for 1000 times in Adobe AIR?

  - by Yinan

  Hi, Here is the case: I have created a test application which simply loops to load a same url for 1000 times by using HTMLLoader class from Adobe AIR. What I found is that the memory of this app keeps rising. So is this expected? I mean it's the same URL although it get loaded for 1000 times. Does the AVM create 1000 objects behind the scene?

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• How to create a non-persistent (in memory) http cookie in C#?

  - by MatthewMartin

  I want my cookie to disappear when the user closes their brower-- I've already set some promising looking properties, but my cookies pop back to live even after closing the entire browser. HttpCookie cookie = new HttpCookie("mycookie", "abc"); cookie.HttpOnly = true; //Seems to only affect script access cookie.Secure = true; //Seems to affect only https transport What property or method call am I missing to achieve an in memory cookie?

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• What is the best way to estimate how much memory a row will require?

  - by Ryan Elkins

  I'm working on a project that will have a single table holding lots and lots of rows on either a SQL Server or SQL Azure installation. I'm trying to estimate how many rows I can store per GB. Is it a matter of simply adding up the memory size of the individual column data types? Is there other overhead to consider?

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• Is it possible to profile CPU / memory inside an Adobe AIR application?

  - by dain

  Couldn`t find any ActionScript native APIs even in the beta documentation, am I right supposing that this means the only way to measure CPU / memory consumption is by cooking up a custom native solution, hooking it up with AIR and making it work on each targeted platform? Basically the aim is to be able to have this information available inside AIR and not having to use an external application for profiling, not even Flex / Flash builder.

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• HOW TO MAKE A USB PEN DRIVE, MEMORY CARD OR HARD DRIVE VIRUS REMOVER AND CLEANER IN C++?

  Do you Know HOW TO MAKE A USB PEN DRIVE, MEMORY CARD OR HARD DRIVE VIRUS REMOVER AND CLEANER IN C++? Check out this link http://snipurl.com/w4361

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• Installing Ubuntu before or after upgrading from Vista to Win 7?

  - by amh

  I just got a new SSD hard drive for my thinkpad laptop. I just installed Vista with the factory CDs. On my old OS, my main OS was Ubuntu but I do want to keep Windows on a separate partition as a dual booth system. I definitely want to upgrade to Win 7 though and I will get it in a few days. My question is: should I install Ubuntu now and then upgrade to Win 7 in a few days? or is that going to mess up with the grub (or something else)? If that is the case, then I'd rather wait to install Ubuntu until after I upgrade to Vista. P.S. I know that probably any kind of mess done by the Win upgrade could be fixed, but I just want to avoid wasting time.

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• Is there a memory efficient and fast way to load big json files in python?

  - by user210481

  I have some json files with 500MB. If I use the "trivial" json.load to load its content all at once, it will consume a lot of memory. Is there a way to read partially the file? If it was a text, line delimited file, I would be able to iterate over the lines. I am looking for analogy to it. Any suggestions? Thanks

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• Update-manager fails silently on 14.04

  - by pabuisson

  I recently reinstalled a lubuntu from scratch, to upgrade to 14.04. Everything's working as expected, except for the update-manager that silently fails when trying to upgrade my system's packages. It does correctly list the packages to be upgraded, I can then click on the "Install now" button (or something like this, I'm running a French flavour of Ubuntu). When I click the button, it seems unresponsive for 5 to 10 seconds, then the upgrade dialog with the progress bar appears, displays "Loading package list", then very shortly something about "authentication" (not long enough so that I can read it).. and closes. The install is fresh and I have no idea where to look. I tried launching update-manager in a term but it doesn't display any error when it fails, only this message when the window first shows up : ** (update-manager:3642): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-m0jkFlZ3yo: Connexion refusée. Any idea where this might come from ? I can upgrade the packages using the command line and sudo apt-get but this is not my computer, and I do not wish its owner to have to do this to upgrade the packages. Thanks for your help !

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• Is there anyway an app can use more than 16mb in memory?

  - by Sarevok

  I understand most Android devices have a 16mb limit (24mb on Nexus One) on the Java heap size. Is there any way a single app can use more memory than that? I know the native SDK doesn't have this limitation but I'd like to stick with Java.

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• What's the memory overhead for a single windows threads?

  - by DayOne

  Is it 1 Mb of stack per thread? Or is that just CLR threads? I want to know the memory over head of native windows threads (c++) and CLR threads as view via Task Manager. Thanks

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• Do null SQLite Data fields take up extra memory?

  - by CSharperWithJava

  I'm using the built in sqlite library on the Android platform. I'm considering adding several general purpose fields that users will be able to use for their own custom applications, but these fields will be blank most of the time. My question is, how much overhead will these blank fields add to my database? Do null fields even take up per record memory in sqlite? If so, how much? I don't quite understand the inner workings of a sqlite database.

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• C#. Where struct methods code kept in memory?

  - by maxima120

  It is somewhat known where .NET keeps value types in memory (mostly in stack but could be in heap in certain circumstances etc)... My question is - where is the code of the struct? If I have say 16 byte of data fields in the struct and a massive computation method in it - I am presuming that 16 byte will be copied in stack and the method code is stored somewhere else and is shared for all instances of the struct. Are these presumptions correct?

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• How to cache *any* object type to memory/disk in java?

  - by Blankman

  Is there a generic way to cache any type of object (be in a java class, or a word document etc.) to memory or disk? Is simply serializing the object, and retaining the file extension (if it has one) enough to rebuild the object?

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• Any way to reserve but not commit memory in linux?

  - by Eloff

  Windows has VirtualAlloc, which allows you to reserve a contiguous region of address space, but not actually use any physical memory. Later when you want to use it (or part of it) you call VirtualAlloc again to commit the region of previously reserved pages. This is actually really useful, but I want to eventually port my application to linux - so I don't want to use it if I can't port it later. Does linux have a way to do this?

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• Is there an in memory database that supports the DATE function?

  - by Chris J

  Hi, I am doing some unit testing for a DAO that works with postgresql. Some of the SQL queries that my DAO uses involve the DATE function. Is there an in-memory database that supports functions similar to the ones that postgresql does? Currently I am looking for support for the DATE function however, I obviously can see myself using other functions in the future.

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• [C++] Is it possible to use threads to speed up memory-mapped file reading ?

  - by Kidpaddle2

  Hi there, I want to read a file as fast as possible (40k lines), and I was wondering if I could just launch one thread per line, using boost::threads on boost::iostreams memory-mapped files. Or if it was just wasting my time because it's just impossible for two threads to access the same file at the same time. Thanks aforehand. Sincerely, Kidpaddle2

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• NSDecimalNumber leaks memory if not used with AutoRelease pool?

  - by bioffe

  NSString* str = [[NSString alloc] initWithString:@"0.05"]; NSDecimalNumber* num = [[NSDecimalNumber alloc] initWithString:str]; NSLog(@" %@", num); [str release]; [num release]; leaks memory *** __NSAutoreleaseNoPool(): Object 0x707990 of class NSCFString autoreleased with no pool in place - just leaking Can someone suggest a workaround ?

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• Does Core Data take appropriate action automatically when there's a Low Memory Warning?

  - by dontWatchMyProfile

  Does it turn some managed objects into faults when there's a Low Memory Warning? Or must we do that manually by calling the -refreshObjects:mergeChanges: method which puts the affected managed objects on diet quickly? And...would that actually hurt? What if these objects are currently used by an NSFetchedResultsController to show up on a table view?

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• How to know in xCode how much memory occupied by my object graph.

  - by ddnv

  I have one big object graph. It begins from one root object and its properties are arrays which consist of other object and so on. I want to know how much memory is eating by this graph at all. Have xCode any instrument that will show me this information by root object?

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• Is there a way to read an .ini file into memory and then read particular values from it?

  - by Clay Nichols

  I've got a situation where an ini file is in memory (in a string variable) and I'd like to read values out of it without writing the ini file data to disk. Is there any way to do that in VB6? Maybe with a Win API call?

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• is GAC a memory area or hard disk area?

  - by northTiger

  is GAC a memory area or hard disk area (C:/windows/Microsoft.net/Assebmly/...) I am confused the word cache in GAC?

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• Can I upload an object in memory to FTP using Python?

  - by fsckin

  Here's what I'm doing now: mysock = urllib.urlopen('http://localhost/image.jpg') fileToSave = mysock.read() oFile = open(r"C:\image.jpg",'wb') oFile.write(fileToSave) oFile.close f=file('image.jpg','rb') ftp.storbinary('STOR '+os.path.basename('image.jpg'),f) os.remove('image.jpg') Writing files to disk and then imediately deleting them seems like extra work on the system that should be avoided. Can I upload an object in memory to FTP using Python?

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