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ncteisen 8 years ago
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      doc/environment_variables.md

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doc/environment_variables.md

@@ -85,6 +85,11 @@ some configuration as environment variables that can be set.
   'all' can additionally be used to turn all traces on.
   'all' can additionally be used to turn all traces on.
   Individual traces can be disabled by prefixing them with '-'.
   Individual traces can be disabled by prefixing them with '-'.
 
 
+  'refcount' will turn on all of the tracers for refcount debugging.
+
+  if 'list_tracers' is present, then all of the available tracers will be
+  printed when the program starts up.
+
   Example:
   Example:
   export GRPC_TRACE=all,-pending_tags
   export GRPC_TRACE=all,-pending_tags