Hosted Graphite is a provider of metric collection, storage and visualization services. This service can also be used to see the JMeter load test runtime statistics. For more details, pls check https://www.hostedgraphite.com

To start with

Create an account at hostedgraphite.com
After account creation, an API key and URL endpoints for each account will be provided by hostedgraphite
Once you have this information, we are good to create our JMeter test plan. Jmeter 2.13 has introduced a new listener called “Backend Listener” which allows you to send test execution results data to Graphite Backend that can be used to:

See real time execution results
Nice graphical metrics
Compare 2 or more load tests
Storing monitoring data as long as JMeter results are in the same backend
For more details please refer to http://jmeter.apache.org/usermanual/realtime-results.html

Backend listener configuration
graphiteHost: Graphite or InfluxDB (with Graphite plugin enabled) server host. In the case of hostedgraphite, you can pass the endpoint URL which you will get in your hostedgraphite account.
graphitePort: Graphite or InfluxDB (with Graphite plugin enabled) server port, defaults to 2003. In the case of hostedgraphite, you will find a port for your endpoint URL in your hostedgraphite account.
rootMetricsPrefix: Prefix of metrics sent to the backend. Defaults to “JMeter.” In the case of hostedgraphite, you will need to send your API key as a prefix as well so that your data can be mapped with your account in hostedgraphite.
summaryOnly: Only send a summary with no detail. Defaults to true.
samplersList: Semicolon separated list of samplers for which you want to report metrics to the backend. For example, as per above screenshot, we are sending metrics for 4 samplers “home; blogs;about; docs”
Percentiles: The percentiles you want to send to the backend. The list must be semicolon-separated.
Test Plan
Add backend listener to your test plan
Start executing your test
Open your hostedgraphite account and go to the dashboard
Create a new dashboard and add graphs to dashboard panels
Edit graphs to define metrics as per your requirements
Backend listener exposed few useful metrics like:

Virtual user metric
Min active threads
Max active threads
Mean active threads
Started threads
Finished threads
Response time metric
Count: count of requests
Min: minimum response time
Max: maximum response time
Percentile: response time percentile (90, 95, 99)