Please note : if the requested resources to run the job are not available, then the job would be in the queued state until the resources are available, they would not be deleted. if the job gets deleted/terminated, then there must be some other issue.
The parallel job would use 350GB from each of the compute nodes (3 in this case) and the total memory requested for this job would be 1.x TB.
If your job has terminated, then please share us the output of
- source /etc/pbs.conf ; $PBS_EXEC/unsupported/pbs_dtj < job id >
eg. source /etc/pbs.conf ; $PBS_EXEC/unsupported/pbs_dtj 111