Endless saving of CoreData Context

Posted by Robert on Stack Overflow See other posts from Stack Overflow or by Robert
Published on 2010-05-29T15:13:48Z Indexed on 2010/05/29 22:02 UTC
Read the original article Hit count: 159

Filed under:

core-data

|

sqllite

Sometimes I noticed that a 'save:' operation an a ManagedObjectContext never returns and consumes 100% CPU.

I'm using an SQL Store in a GarbageCollected environment (Mac OS X 10.6.3). The disk activity shows about 700 KB/s writing. While having a look at the folder that contains the sqlite database file the "-journal" file appears and disappears, appears and disappears, ...

This is part of the call graph from the process analysis:

  2203 -[NSManagedObjectContext save:]
    1899 -[NSPersistentStoreCoordinator(_NSInternalMethods) executeRequest:withContext:]
      1836 -[NSSQLCore executeRequest:withContext:]
        1836 -[NSSQLCore saveChanges:]
          1479 -[NSSQLCore performChanges]
            ...
          335 -[NSSQLCore recordChangesInContext:]
            ...
          20 -[NSSQLCore rollbackChanges]
            ...
          2 -[NSSQLCore prepareForSave:]
            ...
      62 -[NSPersistentStoreCoordinator(_NSInternalMethods) _checkRequestForStore:originalRequest:andOptimisticLocking:]
        ...
      1 -[NSPersistentStore(_NSInternalMethods) _preflightCrossCheck]
        ...
    184 -[NSMergePolicy resolveConflicts:]
      ...
    120 -[NSManagedObjectContext(_NSInternalChangeProcessing) _prepareForPushChanges:]
      ...

Everything a happening in the main GUI thread.

Any ideas what I can to do to resolve the problem?

© Stack Overflow or respective owner

Related posts about core-data

Records not being saved to core data sqlite file

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm a complete newbie when it comes to iOS programming and much less Core Data. It's rather non-intuitive for me, as I really came into my own with programming with MATLAB, which I guess is more of a 'scripting' language. At any rate, my problem is that I had no idea what I had to do to create a… >>> More
iPhone - Core Data crash on migration

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problems, when i install app from Xcode all works but if I build app and install it from iTunes I have an error with the database at launch. This happens only than i have changes in the core data model and need to migrate to a new version. At first launch at crashes with message: Thread 0: 0… >>> More
CoreData update problems

as seen on Stack Overflow - Search for 'Stack Overflow'
My app makes updates in background thread then saves context changes. And in main context there is a table view that works with NSFetchedResultsController. For some time updates work correctly, but then exception is thrown. To check this I've added NSLog(@"%@", [self.controller fetchedObjects]); to… >>> More
Core Data managed object context thread synchronisation

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm have an issue where i'm updating a many-to-many relationship in a background thread, which works fine in that threa, but when I send the object back to the main thread the changes do not show. If I close the app and reopen the data is saved fine and the changes show on the main thread. Also using… >>> More
UITableView Core Data reordering

as seen on Stack Overflow - Search for 'Stack Overflow'
I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of items… >>> More

Related posts about sqllite

Admin GUI for sqllite?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi there, Can anybody recommend a good FREE Admin GUI for Sqllite? Needs to be run on a Windows PC. I tried following some of the links i found via sqllite site which states they are free.. and when arriving they seem to be charging.. I just want a good standard GUI for listing data and executing… >>> More
simple tutorial on how to use sqllite

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, im using vb.net and mssql 2005 to create an application. i was told i should rather use sqllite as i want my application to be a standalone one with embedded database. can someone please provide me with a step to step tutorial on how to create a standalone application with an embedded database… >>> More
Logging erros in SqlLite database from C# Windows Forms Application

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm developing a win app in C# which communicates to a WCF Service. I want to log exceptions that are thrown on client to be logged in Sql Lite Database (Win app is using Sql Lite database for storing data locally). And then later it should be sent to the wcf service when required so that it can be… >>> More
sqllite - sql question 101

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I would do something like this* select * from cars_table where body not equal to null. select * from cars_table where values not equal to null And id = "3" I know the syntax for 'not equal' is <, but i get an empty results. For the second part, I want to get a result set where it only… >>> More
How can i convert datetime to date formate in sqllite

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to show date in DD-MM-YYYY format in datagrid.By default SqlLite store the data in date-time format. so how can i convert date-time format to date format in flex by using SqlLite. >>> More