Bug ID: JDK-8369036 Parallel: JDK-8348278: Trim InitialRAMPercentage caused a performance regression in Footprint3-SwingSet

JDK-8369036 : Parallel: JDK-8348278: Trim InitialRAMPercentage caused a performance regression in Footprint3-SwingSet

Type: Bug
Component: hotspot
Sub-Component: gc
Affected Version: 26

Priority: P2
Status: Open
Resolution: Unresolved

Submitted: 2025-10-02
Updated: 2025-11-03

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JDK 26
26Unresolved

We can observe a 13% regression in Footprint3-SwingSet using Parallel GC on Linux x64.

Have isolated the regression to JDK-8348278.

Causes :	JDK-8348278 - Trim InitialRAMPercentage to improve startup in default modes
Relates :	JDK-8369346 - Remove default value of and deprecate the MaxRAM flag