Few facts:
- - 8 KB is the default page size on Solaris 10 and 11 as of this writing
- - both hardware and software must have support for 2 GB large pages
- - SPARC T4 hardware is capabile of supporting 2 GB pages
- - Solaris 11 kernel has in-built support for 2 GB pages
- - Solaris 10 has no default support for 2 GB pages
- - Memory intensive 64-bit applications may benefit the most from using 2 GB pages
Prerequisites:
OS: Solaris 10 8/11 (Update 10) or later
Hardware: SPARC T4. eg., SPARC T4-1, T4-2 or T4-4
Steps to enable 2 GB large pages on Solaris 10:
Install the latest kernel patch or ensure that 147440-04 or later was installed
- Check the patch download instructions
- Add the following line to /etc/system and reboot
set max_uheap_lpsize=0x80000000
- Finally check the output of the following command when the system is back online
pagesize -a
% pagesize -a
8192 <-- 8K
65536 <-- 64K
4194304 <-- 4M
268435456 <-- 256M
2147483648 <-- 2G
% uname -a
SunOS jar-jar 5.10 Generic_147440-21 sun4v sparc sun4v