fix: Aikar's InitiatingHeapOccupancyPercent value for large servers

[Norbiros]

Prerequisites

• A similar pull request does not already exist, or this pull request supersedes an existing pull request.
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Information

According to original Aikar's post:

If you have and use more than 12GB of memory, adjust the following:

• -XX:InitiatingHeapOccupancyPercent=20

This fixes Aikar's flag generation for large (12+ GB of RAM) servers.