Jupyterhub docs: discuss adding #SBATCH options

pages/merlin6/04-Jupyterhub/jupyterhub.md

@@ -70,14 +70,43 @@ In order for jupyterhub (and jupyter in general) to recognize the provided envir
 Example:
 ```
 conda create -c conda-forge -p /data/user/${USER}/conda-envs/my-test-env python=3.7 nb_conda_kernels
-
 ```
 
 After this, your new kernel will be visible as `my-test-env` inside of your jupyterhub session.
 
 
+## Requesting additional resources
+
+The **Spawner Options** page covers the most common options. These are used to
+create a submission script for the jupyterhub job and submit it to the slurm
+queue. Additional customization can be implemented using the *'Optional user
+defined line to be added to the batch launcher script'* option. This line is
+added to the submission script at the end of other `#SBATCH` lines. Parameters can
+be passed to SLURM by starting the line with `#SBATCH`, like in [Running Slurm
+Scripts](/merlin6/running-jobs.html). Some ideas:
+
+**Request additional memory**
+
+```
+#SBATCH --mem=100G
+```
+
+**Request multiple GPUs** (gpu partition only)
+
+```
+#SBATCH --gpus=2
+```
+
+**Log additional information**
+
+```
+hostname; date; echo $USER
+```
+
+Output is found in `~/jupyterhub_batchspawner_<jobid>.log`.
 
 ## Contact
-In case of problems or requests, please either submit a **[PSI Service Now](https://psi.service-now.com/psisp)** incident containing *"Merlin Jupyterhub"* as part of the subject, or contact us by mail through <merlin-admins@lists.psi.ch>.
+In case of problems or requests, please either submit a **[PSI Service
-
+Now](https://psi.service-now.com/psisp)** incident containing *"Merlin
-
+Jupyterhub"* as part of the subject, or contact us by mail through
+<merlin-admins@lists.psi.ch>.