Update README.md (#3247)

Author: tholor

test/benchmarks/README.md

@@ -2,7 +2,7 @@
 
 
 
-To run all benchmarks (e.g. for a new haystack release):
+To start all benchmarks (e.g. for a new Haystack release), run:
 
 ````
 python run.py --reader --retriever_index --retriever_query --update_json --save_markdown
@@ -28,9 +28,9 @@ where
 ```
 
 Results will be stored in this directory as
-- retriever_index_results.csv (+ .md)
-- retriever_query_results.csv (+ .md)
-- reader_results.csv (+ .md)
+- retriever_index_results.csv and retriever_index_results.md
+- retriever_query_results.csv and retriever_query_results.md
+- reader_results.csv and reader_results.md
 
 
 # Temp. Quickfix for bigger runs
@@ -39,5 +39,7 @@ For bigger indexing runs (500k docs) the standard elastic / opensearch container
 Therefore, start them manually before you trigger the benchmark script and assign more memory to them: 
 
 `docker start opensearch > /dev/null 2>&1 || docker run -d -p 9201:9200 -p 9600:9600 -e "discovery.type=single-node" -e "OPENSEARCH_JAVA_OPTS=-Xms4096m -Xmx4096m" --name opensearch opensearchproject/opensearch:2.2.1`
+
 and
-`docker start elasticsearch > /dev/null 2>&1 || docker run -d -p 9200:9200 -e "discovery.type=single-node" -e "ES_JAVA_OPTS=-Xms4096m -Xmx4096m" --name elasticsearch elasticsearch:7.9.2`
+
+`docker start elasticsearch > /dev/null 2>&1 || docker run -d -p 9200:9200 -e "discovery.type=single-node" -e "ES_JAVA_OPTS=-Xms4096m -Xmx4096m" --name elasticsearch elasticsearch:7.9.2`