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centos 5.3 kernel parameters missing, how to change/set?

Posted on 2009-07-01
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1,435 Views
Last Modified: 2013-11-08
Hello Experts,

I just tried to install Oracle 11g (2 attempt). The install failed because these parameters were missing or not set (I am not sure)
semopm=100; semopm=32
ip_local_port_range=1024 - 65000; ip_local_port_rage=32768 - 6100
rnem_default=4194304; rnem_default=126976
rnem_max=4194304; rnem_max=131071
wnem_default=262144; wnem_default=126976
wnem_max=262144; wnem_max=131071

how do I change/set these parameters?

thx,

regards,
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Question by:epifanio67
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Accepted Solution

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unSpawn earned 500 total points
ID: 24760797
The values you show are sysctl values. One would add them to /etc/sysctl.conf to have them configured centrally. The values are then read on boot or when restarting networking or manually when issuing 'sysctl -e -p /etc/sysctl.conf'. Manually changing values can be done with 'sysctl -w keynname=value' but those changes won't survive a machine reboot.

* When using Oracle products their knowledge base, called Metalink, should be your first source of information. I'm suggesting this because you're listing malformed keynames (net.core.wmem_default, not rnem) and odd values (for  net.ipv4.ip_local_port_range the range is defined as "lowvalue highvalue" so no dashes and lowest int first).
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Author Comment

by:epifanio67
ID: 24765994
thx unSpawn.... I have read your post 20 times... still trying to make sense of it... sorry, I am new Linux...

well, I installed the rpm packages missing. I tried to run the oracle installer again;all rpm packages check pass..  but now I am only missing one param

rnem_default = 4194304; rnem_default = 126976

could you tell me again how to change/set these?

this is all I need to complete my install... thx so much

thx,
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Author Closing Comment

by:epifanio67
ID: 31599055
got it... thx so much unSpawn....

Regards,
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LVL 7

Expert Comment

by:unSpawn
ID: 24768869
You're welcome!
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