Bug 159207

Summary: Hugepages does not get allocated for Oracle 10g
Product: Red Hat Enterprise Linux 4 Reporter: Boris Mironov <bmironov>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0   
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Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2005-05-31 16:04:42 UTC Type: ---
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Description Boris Mironov 2005-05-31 16:02:42 UTC 
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Description of problem:
Oracle 10g database is certified to run on RHEL4 with no changes.
Unfortunately, my system can not use settings that work fine under RHEL3. Namely, I was able to use hugepages.

Under RHEL4 'cat /proc/meminfo' shows no usage of hugepages after Oracle instance starts. At same time a lot of swapping take place.

Version-Release number of selected component (if applicable):
kernel-2.6.9-5.0.5.ELsmp

How reproducible:
Always

Steps to Reproduce:
1. start kernel with hugepages=500 parameter
2. start Oracle 10g
3. 
  

Actual Results:  /proc/meminfo shows no usage of hugepages

Expected Results:  some hugepages should be allocated by Oracle instance

Additional info:

Regarding to numerous postings about SLES9 kernel 2.6 works fine for Oracle inside hugepages
Comment 1 Boris Mironov 2005-05-31 16:04:42 UTC 

*** This bug has been marked as a duplicate of 159195 ***