Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
Home -> Community -> Usenet -> c.d.o.server -> Re: linux os cache and ocfs
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
>
>
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> *** Usenet.com - The #1 Usenet Newsgroup Service on The Planet! ***
> http://www.usenet.com
> Unlimited Download - 19 Seperate Servers - 90,000 groups - Uncensored
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Received on Thu Aug 05 2004 - 09:18:31 CDT