Hi @Oded_Raiches,
As far as I’m aware, QEMU does not have full AVX instruction support yet so will not be compatible with binaries compiled for newer microarchitectures (for example, MongoDB 5.0+). A relevant tracking issue for the feature request appears to be qemu x86 TCG doesn't support AVX insns (#164) · Issues · QEMU / QEMU · GitLab.
Since you are intending to use a feature in MongoDB 6.0, I expect your options at the moment are:
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Build MongoDB from source using older architecture tags compatible with your Qemu environment.
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Upgrade your VM or hosting solution to support newer microarchitecture. AVX (Advanced Vector Extensions) are just over a decade old and should be widely available on modern servers.
Although you have ruled out the option of changing VM type, it may still be worth considering this approach to avoid the overhead of building and testing your own binary packages.
Regards,
Stennie