[yugabyte#7927] Rename deprecated old-rocksdb-metric-name rocksdb_tot…

…al_sst_file_size to rocksdb_current_version_sst_files_size

Summary:
 https://phabricator.dev.yugabyte.com/D6987 from Aug 2019, introduced rocksdb_current_version_sst_files_size metrics. However, for backwards comatibility
 reasons the metric is also exported under the old name: viz: rocksdb_total_sst_file_size

 This diff updates YW to use the new name instead of the old name.

Test Plan:
  eye-ball

Reviewers: timur, daniel, bogdan

Reviewed By: daniel, bogdan

Subscribers: rao, jenkins-bot, ybase

Differential Revision: https://phabricator.dev.yugabyte.com/D11152

cloud/grafana/YugabyteDB.json

@@ -7868,7 +7868,7 @@
       "steppedLine": false,
       "targets": [
         {
-          "expr": "avg(sum without (table_id, table_name) (rocksdb_total_sst_file_size{node_prefix=\"$dbcluster\"})) / 1073741824",
+          "expr": "avg(sum without (table_id, table_name) (rocksdb_current_version_sst_files_size{node_prefix=\"$dbcluster\"})) / 1073741824",
           "hide": false,
           "interval": "",
           "legendFormat": "Size of SSTables",

managed/src/main/java/com/yugabyte/yw/controllers/TablesController.java

@@ -570,7 +570,8 @@ public boolean disableBackupOnTables(List<UUID> tableUuids, Universe universe) {
   private HashMap<String, Double> queryTableSizes(String nodePrefix) {
     // Execute query and check for errors.
     ArrayList<MetricQueryResponse.Entry> values = metricQueryHelper.queryDirect(
-      "sum by (table_id) (rocksdb_total_sst_file_size{node_prefix=\"" + nodePrefix + "\"})"
+      "sum by (table_id) (rocksdb_current_version_sst_files_size{node_prefix=\""
+      + nodePrefix + "\"})"
     );
 
    HashMap<String, Double> result = new HashMap<String, Double>();

managed/src/main/resources/metrics.yml

@@ -1285,7 +1285,7 @@ lsm_rocksdb_num_seeks_per_node:
         "rocksdb_number_db_seek": "Seek"
 
 lsm_rocksdb_total_sst_per_node:
-  metric: "rocksdb_total_sst_file_size"
+  metric: "rocksdb_current_version_sst_files_size"
   function: "sum without (table_id, table_name)|avg"
   operator: "/ 1073741824"
   filters:
@@ -1296,7 +1296,7 @@ lsm_rocksdb_total_sst_per_node:
       type: "date"
     yaxis:
       alias:
-        "rocksdb_total_sst_file_size": "Size of SSTables"
+        "rocksdb_current_version_sst_files_size": "Size of SSTables"
       ticksuffix: " GB"
       tickformat: ".2f"