Update sql-server-linux-performance-best-practices.md

[bangjiehan]

Add a note for open file limitation.

This setting do not apply to systemd services. Most Linux dist now have hard limit of nofile at least 1048576.

There is no reason to set a lower soft limit and I don't know why original author choose a value of 32727 ($2^{15}-1-40$).

[prmerger-automator[bot]]

@bangjiehan : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod[bot]]

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[Court72]

@tejasaks

Can you review the proposed changes?

When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[tejasaks]

Adding @amitkh-msft to review. Original entry was made for Red Hat Enterprise Linux 7 which had a much lower default limit and caused certain issues. probably doesn't apply to RHEL 9 or even 8 but needs to be verified.

[learn-build-service-prod[bot]]

Learn Build status updates of commit 5e6bcfa:

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[learn-build-service-prod[bot]]

Learn Build status updates of commit 2263eb3:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/linux/sql-server-linux-performance-best-practices.md	:white_check_mark:Succeeded

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[prmerger-automator[bot]]

PR 9761 has been merged from bangjiehan:patch-1 to MicrosoftDocs:live by rwestMSFT.

@bangjiehan, @tejasaks, @amitkh-msft, @rwestMSFT