From: Broide Uri <Uri.Broide_at_comverse.com>
Date: Wed, 11 Mar 2015 14:54:02 +0000

Hi Alexey,

1. We opened the requested BUG (GRIZZLY-1748<https://java.net/jira/browse/GRIZZLY-1748>).
2. Can you answer my Questions below

The questions are as follows:

1. Are we looking on the right MBean attributes?

2. Assuming 1 is true, then why for the same load model the thread pool is reaching this high number (max = core + allocated)?

3. Why the thread-pool-started attribute is false?

Thanks
Uri




From: Oleksiy Stashok [mailto:oleksiy.stashok_at_oracle.com]
Sent: Tuesday, March 10, 2015 8:15 PM
To: users_at_grizzly.java.net
Subject: Re: Grizzly Thread Pool Monitoring

Hi Uri,

looks like a bug to me, 12 core threads are not counted as allocated.
Can you pls. file an issue?

Thanks.

WBR,
Alexey.
On 10.03.15 10:26, Broide Uri wrote:
Hi

We are performing Stability load run against our Grizzly based application.
We are trying to determine how to monitor the Thread Pool usage via JMX.
We are looking at the ThreadPool MBean (org.glassfish.grizzly:pp=/gmbal-root/TCPNIOTransport[EndPoint.IMAP.NON_SECURED],type=ThreadPool,name=ThreadPool), on the following attributes:

* thread-pool-max-num-threads

* thread-pool-allocated-thread-count

* thread-pool-core-pool-size


We have conducted 2 load runs (with exactly the same load model):

1. max threads was configured to be 200 (verified against thread-pool-max-num-threads)

o from some point of the load run the thread-pool-allocated-thread-count was stabilized on 188

o thread-pool-core-pool-size was fixed on 12



2. max threads was configured to be 300 (verified against thread-pool-max-num-threads)

o from some point of the load run the thread-pool-allocated-thread-count was stabilized on 288

o thread-pool-core-pool-size was fixed on 12

The questions are as follows:

1. Are we looking on the right MBean attributes?

2. Assuming 1 is true, then why for the same load model the thread pool is reaching this high number (max = core + allocated)?

3. Why the thread-pool-started attribute is false?

Attaching the JConsole print screen of the second run
[cid:image001.png_at_01D05B52.9D7A53B0]

Thanks
Uri



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