Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
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24<br />
<strong>IBM</strong> Advanced Technical Support - Americas<br />
AIX 5.3/6.1 Multiple Page Size Support<br />
� AIX 5.3 5300-04 introduces two new page sizes:<br />
– 64K<br />
– 16M (large pages) (available since Power 4+)<br />
– 16G (huge pages)<br />
• Requires p5+ hardware<br />
• Requires p5 System Release 240, Service Level 202 microcode<br />
• 16MB support requires Version 5 Release 2 of the Hardware Management Console<br />
(HMC) machine code<br />
� User/Application must request preferred page size<br />
– 64K page size is very promising, since they do not need to be<br />
configured/reserved in advance or pinned<br />
• export LDR_CNTRL=DATAPSIZE=64K@TEXTPSIZE=64K@STATSPACK=64K<br />
oracle* to use the 64K pagesize for stack, data & text<br />
– Will require Oracle to explicitly request the page size (10.2.0.4 & up)<br />
– If preferred size not available, the largest available smaller size will be used<br />
• Current Oracle versions will end up using 64KB pages even if SGA is not pinned<br />
� Refer: http://www-<br />
03.ibm.com/systems/resources/systems_p_os_aix_whitepapers_multiple_<br />
page.pdf<br />
© 2009 <strong>IBM</strong> Corporation<br />
April 17, 2009
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