Revert changes on rds metric name (#16078)

metricbeat/docs/fields.asciidoc

@@ -2121,7 +2121,7 @@ type: long
 
 --
 
-*`aws.rds.read.iops`*::
+*`aws.rds.read_io.ops_per_sec`*::
 +
 --
 The average number of disk read I/O operations per second.
@@ -2165,7 +2165,7 @@ type: long
 
 --
 
-*`aws.rds.write.iops`*::
+*`aws.rds.write_io.ops_per_sec`*::
 +
 --
 The average number of disk write I/O operations per second.

x-pack/metricbeat/module/aws/rds/_meta/fields.yml

@@ -63,7 +63,7 @@
       type: long
       description: >
         The lagging size of the replica lagging the most in terms of WAL data received. Applies to PostgreSQL.
-    - name: read.iops
+    - name: read_io.ops_per_sec
       type: float
       description: >
         The average number of disk read I/O operations per second.
@@ -81,7 +81,7 @@
       type: long
       description: >
         The disk space used by transaction logs. Applies to PostgreSQL.
-    - name: write.iops
+    - name: write_io.ops_per_sec
       type: float
       description: >
         The average number of disk write I/O operations per second.

x-pack/metricbeat/module/aws/rds/data.go

@@ -26,7 +26,7 @@ var (
 		"free_storage.bytes":             c.Float("FreeStorageSpace"),
 		"maximum_used_transaction_ids":   c.Float("MaximumUsedTransactionIDs"),
 		"oldest_replication_slot_lag.mb": c.Float("OldestReplicationSlotLag"),
-		"read.iops":                      c.Float("ReadIOPS"),
+		"read_io.ops_per_sec":            c.Float("ReadIOPS"),
 		"throughput": s.Object{
 			"commit":           c.Float("CommitThroughput"),
 			"delete":           c.Float("DeleteThroughput"),
@@ -60,7 +60,7 @@ var (
 		},
 		"swap_usage.bytes":            c.Float("SwapUsage"),
 		"transaction_logs_generation": c.Float("TransactionLogsGeneration"),
-		"write.iops":                  c.Float("WriteIOPS"),
+		"write_io.ops_per_sec":        c.Float("WriteIOPS"),
 		"queries":                     c.Float("Queries"),
 		"deadlocks":                   c.Float("Deadlocks"),
 		"volume_used.bytes":           c.Float("VolumeBytesUsed"),