JDK-8368993 : Parallel: JDK-8348278: Trim InitialRAMPercentage caused a performance regression in SPECjvm2008-SOR.small-ParGC
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 26
  • Priority: P2
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2025-10-01
  • Updated: 2025-11-03
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JDK 26
26Unresolved
Related Reports
Causes :  
JDK-8348278 - Trim InitialRAMPercentage to improve startup in default modes
Relates :  
JDK-8369346 - Remove default value of and deprecate the MaxRAM flag
Description
In SPECjvm2008-SOR small using Parallel GC we can observe a 36% regression on Linux aarch64. There seem to be a regression on about 1-2% for Linux x64 too but this is not statistically confirmed due to to a high variance.