Disambiguate statement "value defaults to a fixed percentage"

[drewmiranda-gl]

This page documents that "In the case of a dedicated search node where the node exclusively has the search role, this value defaults to a fixed percentage of available storage."

However, the document does not provide specifics about what this fixed percentage is. From what I can surmise reading the code [1] [2], and from doing real world testing, this value is set to 80% of the available space on the volume where the file cache lives.

Description

Clarify specifically what fixed percentage is used. See above.

Issues Resolved

Version

All.

Frontend features

Checklist

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