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Re: linux os cache and ocfs

From: utkanbir <hopehope_123_at_yahoo.com>
Date: 5 Aug 2004 07:18:31 -0700
Message-ID: <f6c90ebe.0408050618.67195730@posting.google.com>


Hi ,

I have logged a tar about this issue , and also checked the ocfs code .
The tech support told me that ocfs did not need o_direct flag because the driver use it automatically. I have also checked the ocfs code and saw the o_direct flag , but since this is a driver and does not use open (instead use lower level functions - i think it works like this) , i only see o_direct definitions . But i think it works like this , with ocfs directio oracle paramater is not necessary , it directly uses directIO.I dont know how Mladens issue resolved , but may be he can update us about the latest situation . Based on all these things i will assume that ocfs use directio without any oracle parameter , since direct io does not need linux disk cache , i waste lots of memory on linux for disk cache .

Any more comments will be appreciated.

Kind Regards,
hope

"Christian Antognini" <christian.antognini_at_trivadis.com> wrote in message news:<41113499_at_post.usenet.com>...
> **** Post for FREE via your newsreader at post.usenet.com ****
>
> Hi
>
> > (May be these executables open files once at startup and use the same
> > handle , what do you think ?)
>
> Just open a new connection with SQL*Plus, enable strace on its dedicated
> server process and then execute a SELECT statement that reads some data. If
> your SQL*Plus initialization (e.g. glogin.sql) reads some data in, for
> example, the SYSTEM tablespace, just read data from another one.
>
> Chris
>
>
>
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Received on Thu Aug 05 2004 - 09:18:31 CDT

Original text of this message

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