Glowroot
Open source Java APM
(Very) easy to use
Download and unzip
glowroot-0.14.0-dist.zip,
add -javaagent:path/to/glowroot.jar
to your application's JVM args, point your browser to
http://localhost:4000,
and see all this!
Very (very) low overhead
Overhead depends on many factors, but is generally in the low microseconds due to extensive microbenchmarking and tuning of Glowroot itself.
Get to the root
Glowroot helps you get to the root of application performance issues.
Some nice things users have said:
"I am amazed by how simple and useful it is."
"Wonderful tool. Working in my production server in 15 minutes."
"I really love using glowroot."
"Amazing APM that gets better and better with each release."
"It is simple to use and provides enough data to understand and resolve the bottlenecks."