From: Meltser Tiran <Tiran.Meltser_at_comverse.com>
Date: Tue, 9 Jun 2015 16:55:38 +0000

Hi Alexey,
We don't think this is the case as (I hope) you can see the graph is sorted by Self Time (CPU).

Tiran Meltser
System Architect
Global Products & Operations
Comverse - Making Your Network Smarter

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From: Oleksiy Stashok [mailto:oleksiy.stashok_at_oracle.com]
Sent: Tuesday, June 09, 2015 7:21 PM
To: users_at_grizzly.java.net
Subject: Re: CPU Usage Profiling

Hi Uri,

I suspect what you see is the total time spent inside the method, but most of the time it's in the idle state waiting for I/O events, so it shouldn't consume CPU.
Please let me know if it's not the case.

WBR,
Alexey.
On 09.06.15 16:29, Broide Uri wrote:
Hi Alexey,

After stabilizing on 100% Success Rate in heavy load on our application we started to perform CPU Usage profiling.
We have noticed (you can see the attached screenshot) that we are spending 66% from the CPU time in the org.glassfish.nio.DefaultSelectorHandler.select() method.
We are running the load with the following environment:

* Grizzly 2.3.21

* JDK 1.7.0_72-b14

* RHEL 5.X

Any advice on how can we improve the high CPU consumption?

[cid:image003.jpg_at_01D0A2D6.6204FEE0]

Thanks
Uri

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