Merge branch 'update_seff' into 'master'

Add Note for seff

See merge request !391

content/submitting_jobs/monitoring_jobs.md

@@ -18,10 +18,13 @@ The `seff` command provides a quick summary of a single job's resource utilizati
 seff <JOB_ID>
 {{< /highlight >}}
 
-
-
 {{< figure src="/images/slurm_seff_1.png" height="250" >}}
 
+{{% notice note %}}
+1. `seff` gathers resource utilization every 30 seconds, so it is possible for some peak utilization to be missed in the report.
+2. For multi node jobs, the `Memory Utilized` reported by `seff` is for **one node only**. 
+For more accurate report, please use `sacct` instead.
+{{% /notice %}}
 
 #### sacct