Create
cancel
Showing results for 
Search instead for 
Did you mean: 
Sign up Log in

It's not the same without you

Join the community to find out what other Atlassian users are discussing, debating and creating.

Atlassian Community Hero Image Collage

c1/c2 compiler thread eats a lot of cpu

hi.

My JIRA instalation eats alot of cpu time during "not so high load" at night for example.

thread dump shows that most of the time that threads are on

"C1 CompilerThread3" #8 daemon prio=9 os_prio=0 tid=0x00007f534400a800 nid=0x56d3 runnable [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

 

"C2 CompilerThread2" #7 daemon prio=9 os_prio=0 tid=0x00007f5344008800 nid=0x56d2 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

 

"C2 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007f5344006800 nid=0x56d1 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

 

"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x0000000001eb3000 nid=0x56d0 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

 

any ideas how to debug it?

 one.PNG

1 answer

1 accepted

2 votes
Answer accepted

Hi, Aleksey,

May I know if can see the following on the JIRA logs:

Java HotSpot(TM) 64-Bit Server VM warning: CodeCache is full. Compiler has been disabled.

I believe this may be related to the CompilerThreads using so much CPU. This behavior is fully explained on this blog post:

We don’t have any statistics as to the impact of this on long running performance; the impression that I have is that CPU utilisation & request service time would increase over long running VMs for code that could have been optimised. For a system that is over-committed on CPU resources the application throughput could decrease noticeably.

To try to mitigate that, could you try adding the following parameters to the JIRA startup and restart JIRA:

I hope this helps!

adding that two options helps. tnx

Suggest an answer

Log in or Sign up to
This widget could not be displayed.
TAGS

Community Events

Connect with like-minded Atlassian users at free events near you!

Find an event

Connect with like-minded Atlassian users at free events near you!

Unfortunately there are no Community Events near you at the moment.

Host an event

You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events

Events near you