MATLAB: HUGE memory usage at matlab startup

MATLABmemory

Lately, when starting matlab (R2015b), I'm noticing that it uses an incredibly huge amount of memory, before even doing anything or loading any data. Generally, memory usage is between 2.5Gb and 3GB at startup. Additionally, when using parpool to create threads, each thread starts out using 2.5Gb of RAM before doing anything. Has anyone ever encountered this, any way to fix it? This (especially with parpool) is really limiting what I can do.

Thanks!

Best Answer

Problem solved, the TMP directory had a huge number of files, by changing TMP to a different folder, matlab is now only using 350MB at startup

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MATLAB: Does MEMORY command indicate an increase in memory usage on executing a script though I do not have any variable in the workspace in MATLAB R2014b

The MEMORY function returns the amount of RAM memory that the operating system thinks that MATLAB is using. However, the actual memory usage in MATLAB may be different. What this means is that the additional memory, which is 35 GB int this case is probably still available for use by creating arrays in MATLAB.

In order to confirm this, after running your memory consuming code, please try to allocate random array as shown below.

>> a=rand(100000,10000);

Please check if the above command causes an increase in memory used by MATLAB using the MATLAB command. It is expected that you will not see an increase in the memory usage.

MATLAB: Delimiter usage

It seems to be impossible to use two-spaces-delimiter. You can try make your own dlmwrite function by edit the original. Try

>> open dlmwrite

-> modifications -> save as mydlmwrite

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MATLAB: Does MEMORY command indicate an increase in memory usage on executing a script though I do not have any variable in the workspace in MATLAB R2014b

MATLAB: Delimiter usage

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