Sun OpenSSO Enterprise 8.0 Performance Tuning Guide

AMTUNE_*_MEMORY_TO_USE_IN_MB_*

Description:

Maximum amount of memory that should not be exceeded for 32-bit JRE on different platforms. AMTUNE_MAX_MEMORY_TO_USE_IN_MB_X86 is used to limit the maximum JRE heap size on Linux installed on x86 hardware due to limitations on how much JRE heap size can be allowed even with 32-bit JRE.

Options include:

  • AMTUNE_MIN_MEMORY_TO_USE_IN_MB

  • AMTUNE_MAX_MEMORY_TO_USE_IN_MB_SOLARIS

  • AMTUNE_MAX_MEMORY_TO_USE_IN_MB_X86

  • AMTUNE_MAX_MEMORY_TO_USE_IN_MB_DEFAULT (for Windows)

Required:

Yes

Default Values

AMTUNE_MIN_MEMORY_TO_USE_IN_MB=512

AMTUNE_MAX_MEMORY_TO_USE_IN_MB_SOLARIS=3584 (Sparc/x86/AIX)

AMTUNE_MAX_MEMORY_TO_USE_IN_MB_X86=2341 (Linux)

AMTUNE_MAX_MEMORY_TO_USE_IN_MB_DEFAULT=1536 (Windows)

Additional Information:

Do not modify these values. If the maximum values are changed to higher numbers, the web container will not start on these platforms due to a JRE crash.