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What is the recommended swap size for Red Hat platforms?

Solution Verified - Updated 2020-12-11T00:30:30+00:00 -

Issue

If I add several hundred gigabytes of RAM to a system, do I really need several hundred gigabytes of swap space?
What are the recommended swap size settings for Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8?
What are the recommended swap size settings for Red Hat OpenStack Platform?
How much swap should I assign to a virtual guest, is the recommendation different from a normal system?

Environment

Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 5
Red Hat OpenStack Platform (all versions)

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