Object Allocation Instrument #Net/#Overall

[mpramodjain]

Hi , do any one the main difference between the Net, Overall, #Net and #Overall columns in the Object Allocation instrument table. If So Please reply or send any link referenced to this. tTHank Yyou.

[smasher]

Originally Posted by mpramodjain

Hi , do any one the main difference between the Net, Overall, #Net and #Overall columns in the Object Allocation instrument table. If So Please reply or send any link referenced to this. tTHank Yyou.

I believe that "Net" means objects that are still allocated right now - and "Overall" is the total number over the life of the application so far.

So if you create 10 strings, and then 5 are deallocated, your numbers will show as
Net: 5 Overall: 10

[mpramodjain]

Originally Posted by smasher

I believe that "Net" means objects that are still allocated right now - and "Overall" is the total number over the life of the application so far.

So if you create 10 strings, and then 5 are deallocated, your numbers will show as
Net: 5 Overall: 10

Any Idea on #Net/#Overall in OBject Allocation Instrument.

[smasher]

# Net and # Overall are the number of objects of that type;
Net Bytes and Overall Bytes are the amount of memory used by all of those objects.

To finish off the example -
If you create 10 strings, and then 5 are deallocated, your numbers will show as
# Net: 5
# Overall: 10

If Each string takes up 100 bytes of memory, you'll also see
Net Bytes: 500
Overall Bytes: 1000

[mpramodjain]

Originally Posted by smasher

# Net and # Overall are the number of objects of that type;
Net Bytes and Overall Bytes are the amount of memory used by all of those objects.

To finish off the example -
If you create 10 strings, and then 5 are deallocated, your numbers will show as
# Net: 5
# Overall: 10

If Each string takes up 100 bytes of memory, you'll also see
Net Bytes: 500
Overall Bytes: 1000

Hi Smasher,

Thanks for the fruitful info. Can u help in giving me any link or article on web to get through these issues(Instruments ) clearly.Thank u again.

[scottiphone]

You can search for any Apple tools and examples at the Apple developer site.

Instruments User Guide: Introduction to Instruments User Guide


You can use the web or download a pdf.

[mpramodjain]

Hi,

I am using Http Connection for every 3 seconds, by invoking timer. I am getting the httpconnection well. But after running for around 5 minutes , my application getting crashed, without showing any memory leaks. In my application I just use a timer , NSURL and NSDATA. I didnt made any alloc to release. But my applicaiton getting crash.


Following is the timer class for http connection.

-(id)startConnectionTimerNSTimer*)timer{
NSURL *imageUrl=[NSURL URLWithString:@"http://www.osei.noaa.gov/IOD/OSEIiod.jpg"];
NSData *imageData=[NSData dataWithContentsOfURL:imageUrl];
return self;


}

Following are the some of observation I made of my Knowledge..
1) In Leak Instrument, the #Net/Overall allocation histogram is turning towards RED. As per the instrument user guide , I found this need to do some investigation. But I dont how can I make this clear. I am calling timer in which no allocations were done to release.


Do anyone had the solution or support Please help.