With SLURM for your own sake it is important not to overallocate the resources while pending time slot for the computing job. For example if you request 50 GB of RAM for you computing job while it actually uses 5 GB. Then the job will wait for computing slot for 50 GB of job and this could mean that you will wait computing time for multiple days.

Or if you running parallel jobs then your jobs will run one by one istead of running all the jobs at the same time.

Also other users will suffer while they are waiting for computing resources that are reserver for no reason.