Maximum memory you can use in NT 64bit.

[jim_feyn]

Greetings to my fellow Ninja Traders.

I would like to ask you what's the maximum amount of memory that NT can utilize. Currently I am in a Win7 64bit machine with 16GB Ram but I will need at least 64GB for a complex indicator I developed. Does any of you run NT in machines with more memory than 64GBs?

Is there any restriction in NT or I am bound only by my operating system? What if I use Amazon Instances for example where I can define the amount of memory my machine will have?

Thank you for your time!

[NinjaTrader_Kyle]

Hello,

Thank you for your post.

As a .NET application, NinjaTrader is limited in it's total memory access to 1.2 GB in 32-bit mode and 2.4 GB when running in 64-bit mode.

Please let me know if you have any other questions on this topic.

[jim_feyn]

Strange, because I already use 15 GB of RAM out of 16 GB. Since I don't have more than 16 I split S&P500 for example into smaller portfolios and do my backtests twice (i.e. one for S&P500 #1 and another backtest for S&P500 #2). I was wondering if I could use more than 16 if NT would cooperate with this.

Thank you sir.

[koganam]

Strange, because I already use 15 GB of RAM out of 16 GB. Since I don't have more than 16 I split S&P500 for example into smaller portfolios and do my backtests twice (i.e. one for S&P500 #1 and another backtest for S&P500 #2). I was wondering if I could use more than 16 if NT would cooperate with this.

Thank you sir.

2GiB is the memory limit for a process. As the CLR itself takes up about 600MiB to 800MiB of memory, a .NET process effectively starts to cough at about 1.2 GiB.

The memory limit for a single .NET object is also 2GiB. You can have multiple objects being addressed by a single process, so what you are seeing is not impossible.

You just need to be aware of the different limitations on memory.

This codeproject article has a good explanation of these matters: http://www.codeproject.com/Articles/...-a-NET-Process