Improve README; check-memcached
-check-memcached
-==========
+# check-memcached
+
+## Description
+Check memcached by set and get specified key.
-Check memcached.
-Set and get specified key.
## Synopsis
+```
+check-memcached -H localhost -p 11211 -t 3 -k KeyForTest
+```
+
+## Installation
+
+First, build this program.
+
+```
+go get github.com/mackerelio/go-check-plugins
+cd $(go env GOPATH)/src/github.com/mackerelio/go-check-plugins/check-memcached
+go install
+```
+
+Or you can use this program by installing the official Mackerel package. See [Using the official check plugin pack for check monitoring - Mackerel Docs](https://mackerel.io/docs/entry/howto/mackerel-check-plugins).
+
+
+Next, you can execute this program :-)
+
+```
+check-memcached -H localhost -p 11211 -t 3 -k KeyForTest
+```
+
+
+## Setting for mackerel-agent
+
+If there are no problems in the execution result, add s setting in mackerel-agent.conf .
+
+```
+[plugin.checks.cert-memcached-sample]
+command = ["check-memcached", "-H", "<Hostname>", "-p", "<Port>", "-t", "<DialTimeout>", "-k", "<KeyForTest>"]
+```
+
+## Usage
+### Options
-```shell
-check-memcached [-H Hostname] [-p Port] [-t DialTimeout] -k KeyForTest
```
+ -H, --host= Hostname (default: localhost)
+ -p, --port= Port (default: 11211)
+ -t, --timeout= Dial Timeout in sec (default: 3)
+ -k, --key= Cache key used within set and get test
+```
+
+
+## For more information
+Please execute `check-memcached -h` and you can get command line options.
