Add memory free and per process memory usage to nvidia_smi (#5796)

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##### Summary

Add memory free
Add per process memory usage

##### Component Name

nvidia_smi

##### Additional Information

1 files changed, 3 insertions, 2 deletions

diff --git a/collectors/python.d.plugin/python_modules/bases/charts.py b/collectors/python.d.plugin/python_modules/bases/charts.py
index 624f75b6b7..6e78ed6e7c 100644
--- a/collectors/python.d.plugin/python_modules/bases/charts.py
+++ b/collectors/python.d.plugin/python_modules/bases/charts.py
@@ -200,12 +200,13 @@ class Chart:
         self.dimensions.append(dim)
         return dim
 
-    def del_dimension(self, dimension_id):
+    def del_dimension(self, dimension_id, hide=True):
         if dimension_id not in self:
             return
         idx = self.dimensions.index(dimension_id)
         dimension = self.dimensions[idx]
-        dimension.params['hidden'] = 'hidden'
+        if hide:
+            dimension.params['hidden'] = 'hidden'
         dimension.params['obsolete'] = 'obsolete'
         self.create()
         self.dimensions.remove(dimension)