JDK, the not so hidden treasures
•5 likes•1,622 views
Report
Share
Download to read offline
There is a number of tools that are as part of a JDK installation. Often, you can rely only on these successfully analyse issues, without the need to resort to (often expensive) 3rd party tools. What is better, these being part of the JDK, they can be used as early as development and testing! Taking and analysing memory dumps, stack traces of java processes running in a particular system, monitoring GC activity.. and more, command line as you would hope when accessing this well-protected machine in a data centre somewhere far. This session will iterate through a number of such tools, discuss purpose and capabilities. All followed with demonstrations of most common usages. Unleash the power of the tools that you already have, today!
Recommended
More Related Content
What's hot
How to Setup A Pen test Lab and How to Play CTF n|u - The Open Security Community
24.2K views•22 slides
What's hot(20)
Similar to JDK, the not so hidden treasures
Similar to JDK, the not so hidden treasures(20)
More from Andrzej Grzesik
More from Andrzej Grzesik(9)
Recently uploaded
Recently uploaded(20)
JDK, the not so hidden treasures
- 1. JDK not so hidden treasures Andrzej Grzesik
- 5. java
- 10. log gc :-)
- 11. when things go…
- 13. does it run?
- 14. top // htop
- 16. every known problem becomes completely new when you add “in Java” stolen from: @mryapee
- 19. jps -lvm Java ProcesseS LoVe Memory
- 22. jar
- 23. jar -tf
- 25. jinfo
- 26. demo
- 28. javac
- 30. javap
- 35. and jhat
- 36. demo
- 37. stacktraces :)
- 38. kill -3 <pid>
- 39. demo
- 40. caveat ;-)
- 41. caveat ;-) prints to STDOUT of the running process
- 42. jstack
- 44. caveats only at safepoints, one thread at a time
- 47. demo
- 48. jstat
- 49. jstat <metric> <options> PID <interval> <count>
- 50. demo
- 52. jstatd
- 54. jcmd
- 55. jvisualvm
- 58. Thank you!