Fix names

Author: yngvar-antonsson

CHANGELOG.md

@@ -22,8 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - tnt_memtx_tuples_data_total
   - tnt_memtx_tuples_data_read_view
   - tnt_memtx_tuples_data_garbage
-  - tnt_memtx_index_extents_total
-  - tnt_memtx_index_extents_read_view
+  - tnt_memtx_index_total
+  - tnt_memtx_index_read_view
   - tnt_vinyl_memory_tuple
 
 ### Deprecated

doc/monitoring/metrics_reference.rst

@@ -985,11 +985,11 @@ Read view statistics
             -   Memory (in bytes) that is unused and scheduled to be freed
                 (freed lazily on memory allocation).
 
-        *   -   ``tnt_memtx_index_extents_total``
+        *   -   ``tnt_memtx_index_total``
             -   Total amount of memory (in bytes) allocated for indexing data.
-                This includes ``tnt_memtx_index_extents_read_view`` metric value
+                This includes ``tnt_memtx_index_read_view`` metric value
                 plus memory used for indexing tuples
                 that are actually stored in memtx spaces.
 
-        *   -   ``tnt_memtx_index_extents_read_view``
+        *   -   ``tnt_memtx_index_read_view``
             -   Memory (in bytes) held for read views.

metrics/tarantool/memtx.lua

@@ -143,8 +143,8 @@ local function update()
             memtx_stat_3.data.garbage, nil, nil, {default = true})
 
 
-    collectors_list.memtx_index_extents_total =
-        utils.set_gauge('memtx_index_extents_total',
+    collectors_list.memtx_index_total =
+        utils.set_gauge('memtx_index_total',
             'Total amount of memory allocated for indexing data',
             memtx_stat_3.index.total, nil, nil, {default = true})
     collectors_list.memtx_index_extents_read_view =