Merge pull request #28 from digitalearthafrica/faq-item1

Added Item 1 from FAQ candidate log.

docs/Frequently_asked_questions.ipynb

@@ -89,6 +89,32 @@
     "\n",
     "PDFs can be viewed using [Adobe Acrobat Reader DC](https://get.adobe.com/reader/), which can be downloaded for free."
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## My kernel has crashed. What do I do?"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The Digital Earth Africa Sandbox has a finite amount of processing power allocated to each user. This means if you attempt to load or calculate a lot of data, the kernel may crash. You will see a message like this:\n",
+    "\n",
+    "![Kernel error](_static/faq-kernel-restart.PNG){ width=\"300px\" }\n",
+    "\n",
+    "You will not lose any files, but will have to rerun your notebook to continue working. However, if the notebook is still demanding too many resources, it will crash again.\n",
+    "\n",
+    "You can prevent kernel crashes by:\n",
+    "\n",
+    "* Decreasing the area selected for data processing\n",
+    "* Shortening the time extent\n",
+    "* Shutting down kernels of notebooks you have finished using: open the notebook and select **Kernel -> Shut Down Kernel**\n",
+    "\n",
+    "These actions reduce the memory load of your computation on the Sandbox."
+   ]
   }
  ],
  "metadata": {