NT Running Very Very Slowly

[dgregor5]

Hi
Had major problems this evening with NT coming to a standstill on repeat occasions - even without real-time data feed. Basically doing some back testing analysis. In the end it was not even getting through the start up.
I removed NT (using add/delete programs) & installed new version from the NT website. Unfortunately, despite a more rapid entry into the NT platform, the performance rapidly deteriorated to a standstill.

Any ideas ???
thx
David

[dgregor5]

.....and now NT struggles to open again (approx. 10 min) & when open, struggles to do anything.

Is this an issue with a corrupt database again?
if so, the only issue I have with starting a new database is that I lose the oldest historical data from the continuous contracts - would there be any way to recover this ?

thx
David

[NinjaTrader_VinceB]

Hi David,

Thank you for your posts.

Can you please send me a note at ninjatrader dot com referring to this post and I will send you specific instructions on what to do.




Vince

[dgregor5]

Hi.
I did exactly as per the e-mail instructions.
Reloaded back-up data (strategies, database, etc).
Everything works OK until I start backtesting/optimising & then the whole computer performance deteriorates significantly. Upon rebooting the laptop, again NT opens very very slowly.

Any further help ???

thx
David

[NinjaTrader_Ray]

Are you running the latest NT 6.0.1000.5? If not, please update to this version. We did resolve a memory leak in the Strategy Analyzer. This may help although if you are running complex tests, computer RAM resources will be a limiting factor. See if this makes a difference.

[dgregor5]

Yes - I have downloaded the latest version. After the go-slow/stop on the backtesting, the computer basically dies with NT open. The strategy is not complex & i have had no issues previously with this issue with the same strategy-type. It just suddenly deteriorated to this inadequate performance last night for no apparent reason.

thx
DG

[NinjaTrader_Ray]

How big is your database?

[dgregor5]

20 Meg........

[NinjaTrader_Ray]

I would like to know several things -

- When running backtests, are their any other applications running?
- What are your PC specs, RAM and CPU?
- How long will a backtest take if you just leave it?
- When running a backtest, please open task manager so you can see memory usage, are you hitting the wall on RAM?

[dgregor5]

Ray - quite enlightening

1/ I do not typically have any other applications running when in NT.
2/ RAM = 500 Mg (inadequate); CPU = Celeron M380 (1.60GHz 400MHz FSB) - not even up to P4 level!
3/ Historically they have always completed within 2 min worst case for what I do - now it can take anything up to 20 min or the system can just freeze.
4/ Yes I do hit the wall on the RAM. During an optimisation, <5000k available (!). Approx. 10,000k when not optimising & NT sits idle. Approx 250,000k when exit NT & no application running vs. capacity of 500,000k.

Looks like my computer is inadequate to support NT.
Have just ordered 1 Gg RAM upgrade which will hopefully help.
What is surprising is that NT had been working OK until Thursday evening.

I think I will purchase a new computer that is 'NT compliant' - any other hints on minimum product specs that I should target.

thx
David

[NinjaTrader_Ray]

The bigger the better! As much RAM as you can afford and as fast as you can afford. We run 2 GB machines internally but I can see how you will need more in the next few years.

A Celeron for sure is inadequate.

[dgregor5]

thx Ray for your assistance here. DG