Re: Changing kernel parameters

[Lars <sunberg@xxxxxxxxx>]

Thanks for the tips!

I also sent the same mail to focus-linux@xxxxxxxxxxxxxxxxx, so if you
are interesting in the topic, you may want to look what people are
answering there to :) I had to send the mail two times because
linux-admin rejected my mail the first time.

If anyone else have some more info, I will be happy to read and learn from them!

Thanks

--
  Lars

On Fri, Nov 21, 2008 at 2:06 PM, Daniel A. Avelino <daavelino@xxxxxxxxx> wrote:
> Hi Lars,
>
> I already change these parametes working with oracle. I had not any
> bad experience but in mine cases, I was running only oracle (10g) and
> some apache based applications (apache + php + javascript). I think it
> is strange because there are more parameters to change when using
> oracle 10g, both, by work only and in order to tunning it, e.g. memory
> parameters, semaphores and so on. If you wish, I could suggest this
> documentation I already follow sucessfully
>
>  http://www.puschitz.com/TuningLinuxForOracle.shtml
>
> If you are starting the project, I think it will give you a good
> knowledge of the process, including some test you can perform in order
> to give some metrics about your system. It is a Red Hat based
> documentation but is easy to transate it for other distributions.
>
> Please, give us (me?) some feedback.
>
> Good luck,
>
>
> Avelino, Daniel A.
>
> On Fri, Nov 21, 2008 at 10:46 AM, Lars <sunberg@xxxxxxxxx> wrote:
>> Hi!
>>
>> I'm working with Linux in a big enterprise.
>> I now got a job with includes changing out some kernel parameters in
>> one of our internal web services (very critical).
>> Oracle (which we are running) are saying that this is should better
>> our SSO solution on the web servers.
>>
>> Ok, so the kernel parameters are currently like these:
>>                net.ipv4.tcp_keepalive_time = 7200
>>                net.ipv4.tcp_keepalive_probes = 9
>>                net.ipv4.tcp_keepalive_intvl = 75
>>
>> And Oracle want me (us) to change it to:
>>                net.ipv4.tcp_keepalive_time = 300
>>                net.ipv4.tcp_keepalive_probes = 3
>>                net.ipv4.tcp_keepalive_intvl = 20
>>
>> I must do this on several HA servers, so I really dont want this to go wrong!
>>
>> Do you guys have any tips, warnings or anything that can help me do
>> this as smooth as possible? Do you have any bad experiences with
>> changing these values?
>>
>>
>> Thanks!
>>
>> --
>>  Lars
>> --
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>
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