batch_size for DQN

[narrowsnap]

Thanks for your codes which work very well.
The origin DQN(1.dqn.ipynb) set batch_size=32 which is ineffective on GUP so I changed it to 256. But it's bad performance. Is there any experience in this?

batch_size=32

batch_size=256

Or should I try more experiments with batch_size=256 or try more random seed?
Thanks again.