[misc] benchmark description improvement

Author: diego Dupin

src/benchmark/README.md

@@ -11,22 +11,23 @@ How to run :
 mvn clean package -P bench -DskipTests
 
 # run all benchmarks
-java -Duser.country=US -Duser.language=en -jar target/benchmarks.jar
+nohup java -Duser.country=US -Duser.language=en -jar target/benchmarks.jar > log.txt
 
 # run a specific benchmark
 java -Duser.country=US -Duser.language=en -jar target/benchmarks.jar "Select_100_cols"
 ```
 
 Configuration by system properties :
-* TEST_HOST: localhost
-* TEST_PORT: 3306
-* TEST_USERNAME: root
-* TEST_PASSWORD: ""
-* TEST_DATABASE: "testj"
+* TEST_HOST: Hostname. default "localhost"
+* TEST_PORT: port. default 3306
+* TEST_USERNAME: user name. default "root"
+* TEST_PASSWORD: password. default ""
+* TEST_DATABASE: database. default "testj"
+* TEST_OTHER: permit adding connection string options. default ""
 
 example: 
 ```script
 mvn clean package -P bench -Dmaven.test.skip
-java -DTEST_PORT=3307 -Duser.country=US -Duser.language=en -jar target/benchmarks.jar "Select_1_user"
+java -DTEST_PORT=3307 -Duser.country=US -Duser.language=en -jar target/benchmarks.jar "Select_100_cols"
 ```
 

src/benchmark/resources/logback-test.xml

@@ -1,20 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
- ~ Copyright 2020 MariaDB Ab.
- ~
- ~ Licensed under the Apache License, Version 2.0 (the "License");
- ~ you may not use this file except in compliance with the License.
- ~ You may obtain a copy of the License at
- ~
- ~ http://www.apache.org/licenses/LICENSE-2.0
- ~
- ~ Unless required by applicable law or agreed to in writing, software
- ~ distributed under the License is distributed on an "AS IS" BASIS,
- ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- ~ See the License for the specific language governing permissions and
- ~ limitations under the License.
- -->
-
 <configuration>
 
  <appender class="ch.qos.logback.core.ConsoleAppender" name="STDOUT">
@@ -30,4 +14,4 @@
  <appender-ref ref="STDOUT"/>
  </root>
 
-</configuration>
+</configuration>