Remove outputs blocking inputs when output is slow (#4938)

plugins/inputs/internal/README.md

@@ -18,52 +18,54 @@ plugin.
 
 memstats are taken from the Go runtime: https://golang.org/pkg/runtime/#MemStats
 
-- internal\_memstats
-    - alloc\_bytes
+- internal_memstats
+    - alloc_bytes
     - frees
-    - heap\_alloc\_bytes
-    - heap\_idle\_bytes
-    - heap\_in\_use\_bytes
-    - heap\_objects\_bytes
-    - heap\_released\_bytes
-    - heap\_sys\_bytes
+    - heap_alloc_bytes
+    - heap_idle_bytes
+    - heap_in_use_bytes
+    - heap_objects_bytes
+    - heap_released_bytes
+    - heap_sys_bytes
     - mallocs
-    - num\_gc
-    - pointer\_lookups
-    - sys\_bytes
-    - total\_alloc\_bytes
+    - num_gc
+    - pointer_lookups
+    - sys_bytes
+    - total_alloc_bytes
 
 agent stats collect aggregate stats on all telegraf plugins.
 
-- internal\_agent
-    - gather\_errors
-    - metrics\_dropped
-    - metrics\_gathered
-    - metrics\_written
+- internal_agent
+    - gather_errors
+    - metrics_dropped
+    - metrics_gathered
+    - metrics_written
 
-internal\_gather stats collect aggregate stats on all input plugins
+internal_gather stats collect aggregate stats on all input plugins
 that are of the same input type. They are tagged with `input=<plugin_name>`.
 
-- internal\_gather
-    - gather\_time\_ns
-    - metrics\_gathered
+- internal_gather
+    - gather_time_ns
+    - metrics_gathered
 
-internal\_write stats collect aggregate stats on all output plugins
+internal_write stats collect aggregate stats on all output plugins
 that are of the same input type. They are tagged with `output=<plugin_name>`.
 
 
-- internal\_write
-    - buffer\_limit
-    - buffer\_size
-    - metrics\_written
-    - metrics\_filtered
-    - write\_time\_ns
+- internal_write
+    - buffer_limit
+    - buffer_size
+    - metrics_added
+    - metrics_written
+    - metrics_dropped
+    - metrics_filtered
+    - write_time_ns
 
-internal\_\<plugin\_name\> are metrics which are defined on a per-plugin basis, and
+internal_<plugin_name> are metrics which are defined on a per-plugin basis, and
 usually contain tags which differentiate each instance of a particular type of
 plugin.
 
-- internal\_\<plugin\_name\>
+- internal_<plugin_name>
     - individual plugin-specific fields, such as requests counts.
 
 ### Tags:
@@ -76,7 +78,7 @@ to each particular plugin.
 ```
 internal_memstats,host=tyrion alloc_bytes=4457408i,sys_bytes=10590456i,pointer_lookups=7i,mallocs=17642i,frees=7473i,heap_sys_bytes=6848512i,heap_idle_bytes=1368064i,heap_in_use_bytes=5480448i,heap_released_bytes=0i,total_alloc_bytes=6875560i,heap_alloc_bytes=4457408i,heap_objects_bytes=10169i,num_gc=2i 1480682800000000000
 internal_agent,host=tyrion metrics_written=18i,metrics_dropped=0i,metrics_gathered=19i,gather_errors=0i 1480682800000000000
-internal_write,output=file,host=tyrion buffer_limit=10000i,write_time_ns=636609i,metrics_written=18i,buffer_size=0i 1480682800000000000
+internal_write,output=file,host=tyrion buffer_limit=10000i,write_time_ns=636609i,metrics_added=18i,metrics_written=18i,buffer_size=0i 1480682800000000000
 internal_gather,input=internal,host=tyrion metrics_gathered=19i,gather_time_ns=442114i 1480682800000000000
 internal_gather,input=http_listener,host=tyrion metrics_gathered=0i,gather_time_ns=167285i 1480682800000000000
 internal_http_listener,address=:8186,host=tyrion queries_received=0i,writes_received=0i,requests_received=0i,buffers_created=0i,requests_served=0i,pings_received=0i,bytes_received=0i,not_founds_served=0i,pings_served=0i,queries_served=0i,writes_served=0i 1480682800000000000