Ram gets full which stops the training session

[murtazabasu]

Hi, thanks for creating this repo. I have been using your ppo_continuous code for training a robot in ROS. I am training it for 2500 episodes with 400 max time steps and also updating the weights after 400 steps with K_epochs as 80. I strangely find that after each update step there is a spike in the RAM memory. Although this shouldn't be happening because after the update step the clear_memory() gets called which basically deletes all the previousstates, actions, log_probs, rewards and is_terminals. And also, in the K_epoch the gradients are made zero for K iterations. Can you please provide a solution for this?

Have a look at this figure

There is a spike in memory after every update

I have briefly described this issue on stack overflow as well https://stackoverflow.com/q/59281995/10879393

[nikhilbarhate99]

Hey, did you make sure that the length of the of memory is 400 and the clear_memory() is getting called at each update? maybe print it before updating ? because that is the only variable that can stack memory over episodes.

Also, I see that you have modified the code to add some logging variables, maybe that is causing the problem ? check if the problem persists while running it with the same code as in the repository, by changing the environment only.

If not that, then I am not sure what might cause this.

[murtazabasu]

Okay i figured it out, it was that i was appending the losses for plotting the graphs. But I was appending also all the gradients with it, which was the main cause for the memory. So I did .append(loss.item()) which stores only the values and not the gradients.

Thanks!