What is the max number of threads for tests running in parallel

[RatedAbstract]

I’m trying to run TestNG tests in parallel, right now I’ve set “parallel=tests” & ‘thread-count=25’ but I see that only 10 threads are running at a time. Is this testNG’s thread limit? Is there anything we can do to increase this limit?

Thanks

[Cédric Beust ♔]

There is no TestNG thread count limit, I'm not quite sure where this limit exists but I would start by looking at the Javadoc of Executors.

-- 

Cédric

On Fri, Mar 23, 2012 at 2:21 PM, RatedAbstract <shahzada...@gmail.com> wrote:

I’m trying to run TestNG tests in parallel, right now I’ve set “parallel=tests” & ‘thread-count=25’ but I see that only 10 threads are running at a time. Is this testNG’s thread limit? Is there anything we can do to increase this limit?

Thanks

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[RatedAbstract]

Thanks Cédric. I'm will look into javadoc of Executors.

Also, I see that if I run tests in parallel for thread-count=35, most of my tests will fail with be skipped (configuration issue). Do you think this is because of timeout issue, even though I've specified thread timeout anywhere?

On Friday, March 23, 2012 2:47:01 PM UTC-7, Cédric Beust ♔ wrote:

There is no TestNG thread count limit, I'm not quite sure where this limit exists but I would start by looking at the Javadoc of Executors.

-- 

Cédric

I’m trying to run TestNG tests in parallel, right now I’ve set “parallel=tests” & ‘thread-count=25’ but I see that only 10 threads are running at a time. Is this testNG’s thread limit? Is there anything we can do to increase this limit?

Thanks

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[Cédric Beust ♔]

On Fri, Mar 23, 2012 at 4:01 PM, RatedAbstract <shahzada...@gmail.com> wrote:

Thanks Cédric. I'm will look into javadoc of Executors.

Also, I see that if I run tests in parallel for thread-count=35, most of my tests will fail with be skipped (configuration issue). Do you think this is because of timeout issue, even though I've specified thread timeout anywhere?

I don't know, do you have a stack trace?

-- 

Cédric

[Ben Vesco]

How many cores does the box have where you're running tests? There's a
practical limit to how many threads can actually execute at once based
on available cores. Could this be part of your problem? One way to
test is to configure for 1, 2, 4, 6, 8, threads etc. and see if you
get the expected number of executing threads up to a certain point.

On Fri, Mar 23, 2012 at 2:21 PM, RatedAbstract
<shahzada...@gmail.com> wrote:

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[Abstract]

It has 2 cores. I've tried with 2, 4, 6, and 8 threads. It works great uptil 10 threads but once I increase the limit to more then 10 threads it still executes maximum of 10 threads in parallel.

On Friday, March 23, 2012 5:12:37 PM UTC-7, Ben Vesco wrote:

How many cores does the box have where you're running tests? There's a
practical limit to how many threads can actually execute at once based
on available cores. Could this be part of your problem? One way to
test is to configure for 1, 2, 4, 6, 8, threads etc. and see if you
get the expected number of executing threads up to a certain point.

On Fri, Mar 23, 2012 at 2:21 PM, RatedAbstract

> I’m trying to run TestNG tests in parallel, right now I’ve set
> “parallel=tests” & ‘thread-count=25’ but I see that only 10 threads are
> running at a time. Is this testNG’s thread limit? Is there anything we can
> do to increase this limit?
>
> Thanks
>
> --
> You received this message because you are subscribed to the Google Groups
> "testng-users" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/testng-users/-/PufgqMNxf5cJ.
> To post to this group, send email to testng...@googlegroups.com.
> To unsubscribe from this group, send email to

> testng-users+unsubscribe@googlegroups.com.

[Bill Ross]

If you are using DataProvider parallelism, one thing you could try is

System.setProperty("dataproviderthreadcount", "20");

before the dp launches.

Back in JDK 1.4 it looked like you could get about 50 i/o-heavy
threads going on a server CPU before bogging down.

Bill

Abstract <abstra...@gmail.com> wrote:

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[mani kandan]

I was able to run with thread count from 100 till 1000 with preserve-order= false. You can try that.

On Fri, Oct 26, 2012 at 1:19 AM, Eric Pabst <epa...@gmail.com> wrote:

We had the same problem and after debugging TestNG found that we had to add this to the <test> element in the TestNG XML file:

    preserve-order="false"

Eric

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