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Thread: Compass Executor Thread JConsole JTop uses large CPU(sec)

This question is answered. Helpful answers available: 1. Correct answers available: 1.


Permlink Replies: 35 - Pages: 3 [ 1 2 3 | Next ] - Last Post: Dec 22, 2011 8:27 PM Last Post By: miyao lin
otnateos

Posts: 46
Registered: 6/23/08
Compass Executor Thread JConsole JTop uses large CPU(sec)
Posted: Jan 3, 2010 5:14 PM
 
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I am not sure whether this is really issue with JConsole or Compass.

I suspect this has something to do with the batch indexing we perform using Quartz and run Compass Optimizer manually using
CompassTransaction transaction = compass.openSession().beginTransaction();
// do update here
transaction.commit();
compass.getSearchEngineOptimizer().optimize();

This code works great, however in our live server JConsole + JTop shows a really huge numbers CPU(sec) for Compass Executor Thread (about 3500) while in my development machine the same Thread doesn't use the same amount of cpu cycle.

The large number of CPU used by Compass Executor Thread doesn't really affect the performance of the live server at the moment however it really worries me since we had a problem when Compass used 100% CPU when the same Compass Scheduled Executor Thread using the same number of cpu cycle.

1. Is it normal for Compass Executor Thread to use that CPU(sec) or is it something to do with the unreliable JTop plugin?
2. If it is not normal is it related to anything to do with our batch indexing using Quartz?

NOTE: please see attached for JConsole screenshot
Shay Banon

Posts: 4,028
Registered: 9/6/05
Re: Compass Executor Thread JConsole JTop uses large CPU(sec)
Posted: Jan 8, 2010 6:19 AM   in response to: otnateos in response to: otnateos
Helpful
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This might relate to the optimize operation, which is quite heavy one especially if there is a large index. The executor thread is simple a thread pool that (among others) does the optimization process.
otnateos

Posts: 46
Registered: 6/23/08
Re: Compass Executor Thread JConsole JTop uses large CPU(sec)
Posted: Jan 10, 2010 4:09 PM   in response to: otnateos in response to: otnateos
 
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Apparently the CPU (sec) in JTop only indicates the total CPU time has been used by Compass Executor Thread rather than what I believed earlier that the Thread is using a lot of CPU time at that second I am looking at the JTop.

Since the Executor Thread is being reused, the CPU time never been resetted and the count should go down if the related Thread in the Thread Pool is killed
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Re: Compass Executor Thread JConsole JTop uses large CPU(sec)
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