update readme

README.md

@@ -6,6 +6,33 @@ Benchmarking and stress testing tool for the Zabbix server
 
 * Run `./generate-template-clients.sh > clients.xml` and upload template with clients.
 
+## Choose options
+
+```bash
+./bin/zabbix-bench  -h
+Usage of ./bin/zabbix-bench:
+  -client int
+        number of concurrent clients (default 200)
+  -client-format string
+        format of client name (default "client-%d")
+  -max-duration duration
+        max duration of benchmark test
+  -max-metrics int
+        max number of metrics sends
+  -metric-format string
+        format of metric name in packet (default "metric-%d")
+  -packet-delay duration
+        delay of send packet (default 100ms)
+  -packet-send-timeout duration
+        packet send timeout (default 10ms)
+  -packet-size int
+        count of metric in packet (default 400)
+  -threads int
+        number of threads (default 8)
+  -zabbix string
+        address of zabbix server (default "127.0.0.1:10051")
+```
+
 ## Run benchmark
 
 ```bash