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Why do I get the error “qsub: Job exceeds queue resource limits MSG=cannot satisfy server max mem requirement” when submitting a job?

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Why do I get the error “qsub: Job exceeds queue resource limits MSG=cannot satisfy server max mem requirement” when submitting a job?

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The queuing system on the XT4 does not allow memory requests with the #PBS -lmem= flag. Jobs requesting memory will be rejected with the error message shown above. Memory on the XT4 is not shared between nodes. Each node has access to 4 GB of memory. 1 GB per core if all cores are used. Thus, memory is directly related to the number of processors requested. Because the memory is not shared, it does not make sense to request memory directly via PBS. (It is implicitly requested based on the #PBS -lsize=… request.

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