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NT8 with NinZA MP: Chart rendering failed
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Created: by Mich62 Attachments:2

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NT8 with NinZA MP: Chart rendering failed

  #11 (permalink)
Elite Member
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From what you are experiening (high memory usage and indy crash), you are most probably encountering a memory leak caused by some indicator.
If the only indicator on your chart is the profile, then the profile is the cause, the only solution can come from the author correcting his code.

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  #12 (permalink)
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gomi View Post
From what you are experiening (high memory usage and indy crash), you are most probably encountering a memory leak caused by some indicator.
If the only indicator on your chart is the profile, then the profile is the cause, the only solution can come from the author correcting his code.

Bonjour Gomi,

Thanks for writing in (on the topic ).

What you wrote sounds very plausible and you maybe right. However, could it not be that the underlying architecture (in this case the multi threading architecture) of NinjaTrader handles requests in a less efficient way? As is stated by some indicator vendors. An indicator depends on the underlying technology.

It seems it happens when extensive drawings are used. Could it not be a combination of things, I mean NinjaTrader, .Net and the indicator, maybe in combination with the NVIDIA Graphics driver?

I think it must be possible to locate and fix the problem when NinjaTrader, Indicator vendors and users work together.

The problem, with a sound & clear error message, is reported more often before but all threads on this topic ended up dead without a solution.

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  #13 (permalink)
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As you may know, I did create a volume profile for NT8 too, it also does heavy drawing, and it does not leak memory.

In Windows, graphical resources are unmanaged so it's the responsabilty of the programmer to free them when he's done using them.

If you forget one, and since drawing happen very frequently, you get memory leaks.

Please register on futures.io to view futures trading content such as post attachment(s), image(s), and screenshot(s).

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  #14 (permalink)
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Futures Experience: Advanced
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Posts: 18 since May 2012
Thanks: 10 given, 10 received

What I will do is this: I will try the work around (from Sim22) with starting & ending NT with a naked Workspace for a while.

After that I will start NT with my regular Workspace. I expect to see the "Chart Rendering Failed"-message in the log again and increasing memory usage till the computer will become unresponsive. Then I will be able to reproduce it and the problem will likely be caused by rendering of the historic- and real-time data (rancho post 1). If the problems arise while using the work around it will likely been caused by memory leaks (as Gomi stated above).

There still could be other causes. If I am not mistaken Sim22 is 'investigating' if the problem can be caused by NVIDIA (and DirectX rendering issues).


Last edited by Mich62; February 23rd, 2017 at 05:44 PM. Reason: Typo
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  #15 (permalink)
Elite Member
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Favorite Futures: fdax, fesx, fgbl, 6e, cl, es
 
Posts: 18 since May 2012
Thanks: 10 given, 10 received


Mich62 View Post
I am afraid to be left in the dark as indicator vendors are pointing to NinjaTrader for a solution and NinjaTrader keeps pointing to the indicator vendors.

Here's the response from NinjaTrader:

"The best source of support and troubleshooting for custom NinjaScript would be the developer of the custom NinjaScript.

Please don't hesitate to contact me with any NinjaTrader questions.
"

They don't take any responsibility.

In the mean time people are struggling with NT8.

I don't think going back to NT7 is really an option. Neither is another charting program after all the costs I made for NT and the indicators.

So what to do?

I received notice from NinjaTrader yesterday. They confirmed they were looking into the issue. Hopefully we can get this resolved. I will keep you posted.

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  #16 (permalink)
Elite Member
Netherlands
 
Futures Experience: Advanced
Platform: NinjaTrader
Broker/Data: NinjaTrader/Dorman, IB
Favorite Futures: fdax, fesx, fgbl, 6e, cl, es
 
Posts: 18 since May 2012
Thanks: 10 given, 10 received


Mich62 View Post
What I will do is this: I will try the work around (from Sim22) with starting & ending NT with a naked Workspace for a while.

After that I will start NT with my regular Workspace. I expect to see the "Chart Rendering Failed"-message in the log again and increasing memory usage till the computer will become unresponsive. Then I will be able to reproduce it and the problem will likely be caused by rendering of the historic- and real-time data (rancho post 1). If the problems arise while using the work around it will likely been caused by memory leaks (as Gomi stated above).

There still could be other causes. If I am not mistaken Sim22 is 'investigating' if the problem can be caused by NVIDIA (and DirectX rendering issues).

A short update.

Last week I had no crashes or problems at all. I start and end every session with naked charts (Minute- and Tick charts without any indicator), let the data load and then switch to my regular workspace with indicators. If I make a change to my chart I will first disconnect. As said, no problems since then.

This week I will skip the naked chart startup and will use only my regular workspace to see if problems will return.

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