docs: add percentage usage of virtual memory (#2223)

docs was missing a note about percentage memory usage Signed-off-by: Aaron Shaw <shawaj@gmail.com>
giampaolo · Apr 14, 2023 · 9322179 · 9322179
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commit 9322179
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diff --git a/docs/index.rst b/docs/index.rst
@@ -345,6 +345,7 @@ Memory
 
   Other metrics:
 
+  - **percent**: the percentage usage calculated as ``(total - available) / total * 100``
   - **used**: memory used, calculated differently depending on the platform and
     designed for informational purposes only. **total - free** does not
     necessarily match **used**.