Can anyone speak to the Thread Information tab under Monitoring? Trying to diagnose some performance drags and DBA has confirmed our DB is healthy. I just don't know anything about the thread data.
Are these normal thread counts and states immediately following an application restart?
| BLOCKED | 4 |
| RUNNABLE | 29 |
| TIMED_WAITING | 84 |
| WAITING | 116 |
Thanks,
Bill
7.0.2 P07
Hello Azam - Thank you for helping us make some sense of the thread data. Unfortunately, our application servers don't have JDK installed, so I was not able to use the jstack command to further analyze state of threads involved, but I have provided the output of top command from our production server used by SON -
wsavek OS user runs JVM used by Aveksa application. 2.3% CPU usage seems normal to me. This was the thread count by state when I captured above screenshot -
| BLOCKED | 4 |
| RUNNABLE | 39 |
| TIMED_WAITING | 105 |
| WAITING | 191 |
We will engage our Middleware team to see if they have some alternate tools available for us to look at the thread dump for a particular PID.
There are multiple ways to generated thread dump. If you're using linux, run kill -3 JAVA_PID to generate thread dump. It would be generated to application server standard output. See https://dzone.com/articles/how-to-take-thread-dumps-7-options
To troubleshoot issue where you're seeing high CPU usage, both thread dump and top is needed so we can identity which threads consume high CPU/mem from top
Those are Java thread states, same to what is described in Javadoc API https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.State.html
Did you see any high CPU/mem utilization with top command? Output from top/Java thread dump may help to determine which specific threads are consuming CPU https://www.cisco.com/c/en/us/support/docs/wireless/quantum-policy-suite-wi-fi/119010-technote-jstack-00.html
If you encounter performance issue due to high CPU utilization, we need to analyze YourKit snaphots(acm must be started with profiling enabled i.e acm start-with-profiling).
If you need help, please raise RSA Customer case and we will able to assist you.