Answer Posted / deven
When a program needs to store some temporary information
during execution, it can dynamically request a chunk of
memory from the system. However, the system has a fixed
amount of total memory available. If one application uses
up all of the system’s free memory, then other applications
will not be able to obtain the memory that they require.
The implications of a “memory starved” application can
range from a graceful shutdown to an unexpected crash. Most
large scale applications regularly request memory, so
running out of system memory tends to have a domino effect.
Even if the applications do not terminate, the system will
slow down to a crawl—or even hang—in low memory conditions.
Clearly, none of these results are desirable, so the system
never wants to run out—or run low—of memory.
It is the responsibility of each application to “free”
dynamically requested memory when they are finished using
it. Freeing the memory returns it to the system, where it
can be re–allocated to another application when needed.
When an application dynamically allocates memory, and does
not free that memory when it is finished using it, that
program has a memory leak. The memory is not being used by
the application anymore, but it cannot be used by the
system or any other program either.
Memory leaks add up over time, and if they are not cleaned
up, the system eventually runs out of memory. Most everyone
has seen the “Your computer is running low of virtual
memory” message box on Windows when memory gets too high.
It is typically accompanied by horribly slow response time,
and often the user can’t even close the wasteful
application because of this sluggishness. The only response
at that point is to reboot the computer.
Memory leaks are bad on any system. For the automotive
platform, however, they become much more of a significant
problem. This is due to the following:
•Applications stay in memory when not in use. Typically,
the operating system can clean up after a program which
leaks memory after it terminates. However, since we do not
allow the users to easily shut down automotive
applications, Windows CE cannot clean up after any ill–
behaved applications.
•System run–time is expected to be unlimited. If all else
fails, a system reboot will clean up all memory leaks.
However, although we do support system reboots, our goal is
that the user will never need to do so. Since you do not
need to “reboot” your car stereo every few weeks because it
stops working, or because the performance becomes poor, it
is unacceptable to need to do so on the automotive platform.
•Systems typically have lower total available system
memory. Desktop applications can get away with being sloppy
with memory when they run on systems with 64 megabytes of
RAM and more, and with large hard drives to store swapped
out virtual memory pages. But the automotive platform may
have only 16 megabytes total memory, and that includes
process and storage memory together! In order words, that
memory must store what would be in RAM on a desktop PC, as
well as what would be on the hard drive. System memory is
at a premium.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
UFT 12.02 which ALM version will support
Explain different types of checkpoints?
What is quicktest professional?
Explain about Test Fusion Report of QTP?
How to Open FireFox using descriptive programing? If my question is not clear, i will give an Example To Open Internet Explorer, We use Set IE = CreateObject(InternetExplorer.Application) IE.Navigate "www.yahoo.com In the same i need to open yahoo.com in firefox. Can any one tell me what is the server name of firefox to create an object
what are the issues we will get when there is migration from QTP 8.2 to QTP 10.0? Is there any problem in executing scripts of 8.2 on 10.0?
I used child objects to get the no of weblist present in the weblist.now i need to select the items present in each weblist ?How to do so
i have doubt suppose iam purly working in manual, when i will get work to do on sql and performence testing? pls any one clarify doubt?
On what document base Descriptive programming is written if build is not yet ready ?
What do you mean by iteration?
Hi Frenz... I would like to take up the QTP certification . Can anyone tell me what is the procedure. n if anybody have the study materials pls fwd it to jkpunathil@gmail.com
What is post recovery scenario?
Subj: realtime example of Database check point, Can any one please detail on how the Database check point is utilized/implemented in a real time project. I already know how to make one by creating DSN/ODBC and writing the required query manually and other steps...I wanted the actual concept of implementation...couple of live examples will be highly appreciated. Thank you in advance
hi i want license key for qtp 9.2 pls its adjust product name : quick test professional locking code :8 - 54A6A license type : seat license maintenance number : 88888888-8888 pls send license key to my email id borusu.ramkumar@gmail.com
How to check feasibility of the appliction?in automation testing?
