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hugepages in OL8 verus OL9

edited Sep 23, 2025 7:39PM in Linux Operating System (MOSC) 8 commentsAnswered ✓

Its been a while since I have worried about setting up or checking a server for hugepages but I seem to be back there again. We have a mix of OL8 and now OL9 servers running UEK kernel on premise. What I recall or what my notes say is to make sure and do these things and also AnonHugePages should be zero.

This is in relation to running Oracle 19c databases I should add.

For example on an older Ol8 server:

Check to make sure nothing beside AnonHugePages
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 4200
HugePages_Free: 107
HugePages_Rsvd: 4

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