Clearing up memory

New to Julia
1

Hi, I had a question about clearing up memory by removing temporary variables that we have used. For example, if I create a huge matrix

julia> A = rand(100000,10000);

the memory usage on my RAM visibly increases. If I reassign A to be a Float64, as in

julia> A = 2.0;

it still does not clear up the memory. It would be useful if I could get rid of arrays or variables that are needed temporarily in the middle of big computations.

2

2 things. First, you should almost never be reassigning the types of variables. second, you can manually run a GC run with GC.gc(). Note you should not do this frequently.

2 Likes
3

but when you actually need that RAM, GC should kick in. There’s no point clearing unused RAM too eagerly.

5 Likes
4

Thank you for pointing me to the concept of “Garbage Collection”. I will learn more about it.

5

Thank you. I will learn more about “Garbage Collection”.