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NT7.4 - RAM hog
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Created: by kashter Attachments:6

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NT7.4 - RAM hog

  #31 (permalink)
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longboat View Post
Is this still an issue? I haven't upgraded yet cause I am using an older computer till I get a new one and thought I better check. My RAM on this one is less than my main trading computer that crashed and think I should wait, but there are indicators I want that are only for the upgraded NT71...4version.

RAM usage in NT7 is way more efficient than 6.5.

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  #32 (permalink)
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RAM usage in NT7 is way more efficient than 6.5.

I agree way more efficient than NT 6.5 I was just wondering if upgrading to the latest version .4 would slow my computer down than to keep running 7.1000 for another few months.

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  #33 (permalink)
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longboat View Post
I agree way more efficient than NT 6.5 I was just wondering if upgrading to the latest version .4 would slow my computer down than to keep running 7.1000 for another few months.

Apart from a few reports in this thread, we have not fielded any additional reports thus I see no reason that you would see a degradation in performance.

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  #34 (permalink)
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NT 7.0 uses less RAM than NT 6.5, so there should be now RAM problems.

What I noticed: If I edit any one of my indicators, RAM will increase by 200k, typically from 150k to 350k. If I close that edited indicator file, RAM will stay up at 350k unchanged. Not a big deal, but nevertheless puzzling.

I have tested NT 7.0 with my FibonacciAnalyzer (580 DataSeries objects) on a 1 min chart with a lookback period of 220 days. This is a field size of 580 lines x 150 working days x 1395 min/day = 121 million values of data type double. A double value requires 8 bytes, so this is the equivalent to 1 GByte just for this indicator. The loading of that chart took 20 seconds. It is obvious that NinjaTrader will use 1 GByte additional RAM, if I load 1 GByte of data.

Otherwise NinjaTrader 7.0 is quite slim now. With my basic workspace it takes less RAM (150k) than Microsoft Security Essentials (162k), which I am also running.

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  #35 (permalink)
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Fat Tails View Post
NT 7.0 uses less RAM than NT 6.5, so there should be now RAM problems.

What I noticed: If I edit any one of my indicators, RAM will increase by 200k, typically from 150k to 350k. If I close that edited indicator file, RAM will stay up at 350k unchanged. Not a big deal, but nevertheless puzzling.

I have noticed the same thing but it is not high on my priority list of NT Mysteries to solve. Am not 100% sure but I am thinking the extra Ram usage comes from loading the Intellisense Cache. For whatever reason the Ram is not released until NT is Closed.

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  #37 (permalink)
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I have noticed the same thing but it is not high on my priority list of NT Mysteries to solve. Am not 100% sure but I am thinking the extra Ram usage comes from loading the Intellisense Cache. For whatever reason the Ram is not released until NT is Closed.

Maybe it is a deliberate choice. Editing the first indicator takes some time, as everything needs to be loaded. Editing indicators from there on is faster, as the cache is still available. Anyhow, you don't code and trade on the same machine at the same time, or do you?

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  #38 (permalink)
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Maybe it is a deliberate choice. Editing the first indicator takes some time, as everything needs to be loaded. Editing indicators from there on is faster, as the cache is still available. Anyhow, you don't code and trade on the same machine at the same time, or do you?

Absolutely not. My trading computer has never seen a website, email, instant message. No software has ever been installed on it other than NT. Developed indicators are transferred via thumb drives after virus scans. Its a virgin computer.

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  #39 (permalink)
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The Strategy enable/disable cycle adds to RAM usage as well. It is still a Best Practice to restart NT once a day or once a week, depending on what you do and how you do it IMHO.

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  #40 (permalink)
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Update - Memory Degradation


Since my last post, I have had no issues, or more accurately, I have not been able to replicate the memory issue until today.

Here is whats happening:
I have had a single workspace (in addition to the default) with all my charts in it. I decided to the separate the workspace into two, each per instrument I trade. Memory was checked and no problems so far. I have not added any new indicators or instruments from the original workspace. I have Gomi's suit of indicators that have not caused any issues in the past, so I have no reason to suspect them. Each of the new workspace holds exactly same number of charts as the original workspace. I checked memory usage again and it was around 180-220,000k. This is normal, and gets as high as 300,00k close to EOD. Nothing serious here.

Now I changed slightly the indicator settings on few of the charts, just colors (mostly to suit visual). Saved each of the templates after each change. Saved both of the workspaces. Checked memory and it has climbed to >400,000k. Ok I thought this was the effect of the changes.

Later on (2 hrs later), the mouse started to lag - I am back with the original problem and the reason of this thread. Rechecked memory every 15 mins from there on and it was steadily climbing. As of this writing, it is at more than 1,300,000k (50,000k more since I started writing this post). The mouse continues to lag. Lucky I am not a scalper.

You mentioned in your reply to my original post that you will have someone at NT look into this. Have you had any feedback yet? Please let me know if you need more info as this seems like a bizarre issue and I would like to know how to avoid it (from my part I will not fiddle with indicator settings no more during trading).

EDIT: Video added though the lack of 'change' crosshair may make it hard t see.
Cheers,
K


Last edited by kashter; April 14th, 2011 at 12:53 PM. Reason: Added video
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