adapt readme

Author: ulranh

README.md

@@ -100,7 +100,7 @@ $ ./hana_sql_exporter pw -tenant q01,qj1 -config ./hana_sql_exporter.toml
 Now the web server can be started:
 #### Binary
 
-The default port is 9658 which can be changed with the -port flag. The standard timeout is set to 10 seconds, which means that if a scrape for one metric and tenant takes more than 10 seconds, it will be aborted. This is normally only the case, if a tenant is overloaded. In my experience the scrapes for 25 tenants and 30 metrics in one config file take approximately 250ms altogether, if all tenants are responsive. Normally I set the timeout flag to 3 seconds and the scrape timeout for the corresponding Prometheus job to 10 seconds.
+The default port is 9658 which can be changed with the -port flag. The standard timeout is set to 10 seconds, which means that if a scrape for one metric and tenant takes more than 10 seconds, it will be aborted. This is normally only the case, if a tenant is overloaded. In my experience the scrapes for 25 tenants and 30 metrics in one config file take approximately 250ms altogether, if all tenants are responsive. Normally I set the timeout flag to 3 seconds, the scrape timeout for the corresponding Prometheus job to 10 seconds and the scrape intervall to one minute.
 
 ```
 $ ./hana_sql_exporter web -config ./hana_sql_exporter.toml -timeout 3