update readme

instrumentation/dalli/README.md

@@ -30,6 +30,22 @@ OpenTelemetry::SDK.configure do |c|
 end
 ```
 
+### Configuration options
+
+```ruby
+OpenTelemetry::SDK.configure do |c|
+  c.use 'OpenTelemetry::Instrumentation::Dalli', {
+    # You may optionally set a value for 'peer.service', which
+    # will be included on all spans from this instrumentation:
+    peer_service: '',
+
+    # The obfuscation of query in the db.statement attribute is enabled by default.
+    # To disable, set db_statement to :include; to omit the query completely, set db_statement to :omit
+    db_statement: :include,
+  }
+end
+```
+
 ## How can I get involved?
 
 The `opentelemetry-instrumentation-dalli` gem source is [on github][repo-github], along with related gems including `opentelemetry-api` and `opentelemetry-sdk`.

instrumentation/mysql2/README.md

@@ -46,9 +46,9 @@ end
 ```ruby
 OpenTelemetry::SDK.configure do |c|
   c.use 'OpenTelemetry::Instrumentation::Mysql2', {
-    # The obfuscation of SQL in the db.statement attribute is disabled by default.
-    # To enable, set db_statement to :obfuscate.
-    db_statement: :obfuscate,
+    # The obfuscation of SQL in the db.statement attribute is enabled by default.
+    # To disable, set db_statement to :include; to omit the query completely, set db_statement to :omit
+    db_statement: :include,
   }
 end
 ```

instrumentation/pg/README.md

@@ -50,9 +50,9 @@ OpenTelemetry::SDK.configure do |c|
     # will be included on all spans from this instrumentation:
     peer_service: 'postgres:readonly',
 
-    # By default, this instrumentation includes the executed SQL as the `db.statement`
+    # By default, this instrumentation obfuscate/sanitize the executed SQL as the `db.statement`
     # semantic attribute. Optionally, you may disable the inclusion of this attribute entirely by
-    # setting this option to :omit or sanitize the attribute by setting to :obfuscate
+    # setting this option to :omit or disbale sanitization the attribute by setting to :include
     db_statement: :include,
   }
 end