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24 GB RAM only?

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gin

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3 years ago #259774

Why is SQ limited to 24GB RAM, JAVA limitations?

SQ detected and used only 24 GB RAM, whilst I have got 128 GB RAM

 

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tomas262

Administrator, sq-ultimate, 2 replies.

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3 years ago #259775

Hello,

neither SQX not Java is not limited to 24GB. What SQ build do you use now? Can you verify your Configuration -> Memory is set to “Let program determine max memory” … if yes, can try to “Set maximum memory to : 48GB”?

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hankeys

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3 years ago #259777

i need to always set RAM manually – SQX automatically reserve very few memory

if i have on server 128 GB, i set manually to 120 GB and in laptop with 8 GB i set manully to 6

if i let to decide SQX the RAM is set at very low value and it doesnt make sense to me

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Enyx

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3 years ago #259995

i need to always set RAM manually – SQX automatically reserve very few memory if i have on server 128 GB, i set manually to 120 GB and in laptop with 8 GB i set manully to 6 if i let to decide SQX the RAM is set at very low value and it doesnt make sense to me

And does it make any difference performance wise ?  It seems to me you just creating larger java heap  and thus more work for GC. SQX is pre-caching in memory market and indicator data and it’s just sharing between runs which is cool (but very bad for NUMA servers but that’s other story)

Enyx

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hankeys

Customer, bbp_participant, community, sq-ultimate, 487 replies.

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3 years ago #260024

its not about performance but i dont want to end with frozen GUI, because for some of my projects (retesting on 16 markets) i need something like 50 GB RAM – and if i let SQX set the ram automatically i will have not enough

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Enyx

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3 years ago #260025

ok now it makes sense and excellent feedback.

I did a little research on latest SQX129Dev6 and it seem “Auto memory size” is indeed removing maximum heap size from java launch. Which basically means it 50% of ram.

Does it sound like a new feature request to allow java heap size memory as percentage of memory or variation of it ?

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Enyx

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3 years ago #260026

Correction: It should be less memory kind of 1/4 ram but it’s platform depended. Do not have time to check in depth but it’s definitely too fuzzy as default.

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