We have recently installed SQL Server 2019 on a server, running Ubuntu 20.04 (server edition). Under our specific use case, executing integration testing against this SQL Server instance, it takes 2-3 times longer than executing the same tests against an SQL Server instance running in a VirtualBox VM under Windows, on the same hardware.
We have followed and implemented various recommendations for improving SQL Server performance for Linux, but no significant change in performance was observed.
Is there something fundamental that makes SQL Server 2019 on Linux perform 2-3 times slower than on Windows in a VirtualBox VM on the same server?
Thank you.
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