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MC Bunji avatar image
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MC Bunji asked Julie Weller commented

How to set the maximum queue capacity to unlimited

Hey, Flexsim Gurus!

How can I set the maximum queue capacity to unlimited?

FlexSim 23.1.3
queue sizeunlimited queue capacity
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5 |100000

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Joerg Vogel avatar image Joerg Vogel commented ·

@MC Bunji , please don’t do that, because you would include a source of model failure by default. You could set for example a vast high capacity of all created items of a simulation run instead.

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Julie Weller avatar image Julie Weller commented ·
Hey @MC Bunji! What's your ultimate goal with setting it to be unlimited?
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MC Bunji avatar image MC Bunji Julie Weller commented ·
I will have to use the experimenter function to find the throughput under 10 replications, which will be the sum of the items on the queues.
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Julie Weller avatar image Julie Weller commented ·

Hi @MC Bunji, was Felix Möhlmann's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

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Felix Möhlmann avatar image
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Felix Möhlmann answered Jason Lightfoot edited

There are better ways to measure throughput than to keep every item in a queue.

You can let the items flow into a sink and use the sink's input/output stat to measure the throughput. You can pin it to a dashboard and if needed, you can sample that table/chart to copy the value into a performance measure.

measure-throughput-fm.fsm

And even if you want to use the queue and keep the items. Just use a very large value as the capacity as Jörg suggested. I'd wager your PC is going to run out of RAM long before the model reaches something close to 1 billion items.


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Jason Lightfoot avatar image Jason Lightfoot ♦ commented ·

Also, it sounds like you should not be modelling each item and its events but groups of items - boxes or totes etc. If you are conveying the individual items you should be using the Mass Flow Conveyors.

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Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.