Hello,
I am using a tdms file to store and read back data for displaying on a graph. There are seperate programs running, one for acquiring data and program control being displayed on one PC monitor, and the other displaying data on 6 selectable panes with waveform graphs on a seperate PC monitor.
Here is my general program operation.
I open the tdms file and use a global variable to hold the refnum. I then write to and read from the file from multiple locations continuously while the system is running.
While doing this there is a steady increase in memory usage which doesn't go away when the file is closed, deleted, then recreated which was an attempt to clear the memory. I am roughly losing 250MB of memory every hour the system is running.
Also I have a tdms file used for data logging which is opened and closed during every write cycle and I do not see the memory growth as seen when keeping the file open.
To test where the memory leak was coming from because my overall program is very large, I diagram disabled all of the tdms writes on the open file and no longer saw the memory usage increase.
Things I have tried are:
- Flushing tdms memory after writing or reading
- Closing file periodically, deleting it, then recreating it
- Tested only writing to file, disabled reading
despite these efforts the memory continues to increase.
This is a major problem because the client this software was created for needs to run tests for at least 24 hours at a time and currently that is not possible because the system eats up all the memory and labview crashes within something like 6 hours.
I am using labview 8.2, after seing that 8.2.1 hads some major updates to tdms functionality, I advised our client to upgrade but no change has been seen in the performance
Thanks in advance
Ryan
