Why isn't my job running on Shamu?

• System load is high on the compute nodes
• A system downtime has been scheduled and jobs are being held. Check the message of day which is displayed every time you login.
• You or your group are at the maximum processor count for your node or queue
• Your job is requesting specialized resources, such as large memory or certain software licenses, that are in high demand
• Your job is requesting a lot of resources. It takes time for the resources to become available
• Your job is requesting incompatible or nonexistent resources and can never run.
• Your resource requests unnecessarily restrict the nodes where the job can run, for example by requesting an individual node that is already being used by the scheduler
• Your job is requesting a predefined queue which your user does not have permission to use, i.e. trying to use bigmem.q