Experimenter run speed?

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Ankur A3 asked Aug 17, '22 Jeanette F commented Aug 24, '22

Experimenter run speed?

Hi Team,

I am running 6 scenarios (4 replications each) for 6 months using experimenter. I have observed run speed is fast for 25% of the run length (Taking around 30 min) in 4 parallel replication. Then it is slow for remaining 75% run length (taking around 3 hours).

I would like to know if there is any specific reason for it.

Is there any way to speed up the process?

Thank you!

Software Version:

FlexSim 21.1.5

experimenter speed

· 3

Joerg Vogel commented · Aug 17, 2022 at 05:39 PM

You need much more memory. Your System transfers at some point data from Cache to RAM and from RAM to drives. This slows it down.
Best would be you could compute your experiments completely in RAM. Only results and dashboard data are stored on drives.

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Jordan Johnson ♦♦ commented · Aug 19, 2022 at 02:59 PM

Another possibility is that your model gets slower as it runs. If you have more than 20% of your RAM available and you still see the slowdown, then it is a model issue. There are many operations in a model that get slower depending on the number of items in the model. For example, using an ORDER BY statement in a Pull from List can go quickly when there are few things on the list but take much longer when more things are on the list.

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Jeanette F ♦♦ commented · Aug 24, 2022 at 06:32 PM

Hi @Ankur A3, was one of Jeanette F's or Joerg Vogel's answers helpful? If so, please click the "Accept" button at the bottom of the one that best answers your question. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always unaccept and comment back to reopen your question.

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Answer 1 · 2022-08-19T06:29:36Z

Joerg Vogel answered Aug 19, '22 Joerg Vogel edited Aug 19, '22

You can reduce number of experiments running simultaneously. Please identify the number of experiments that you can run simultaneously with least time. You can limit the number of CPU cores in experiment setting for that. Maybe you can accelerate your experiment if your system must not swap data between RAM and drive space to often.

Answer 2 · 2022-08-17T19:03:29Z

Jeanette F answered Aug 17, '22

Like @Joerg Vogel mentioned, this could be a memory issue.

If you check your task manager while you run the simulation I assume you will see your RAM being maxed out. A solution for would be to see if your RAM could be upgraded.

If you see that your CPU is having problems then maybe the following article will be helpful for you.

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