RE: unix - calc file descriptors
- From: "Khemmanivanh, Somckit" <somckit.khemmanivanh@xxxxxxxxxxxxxxxx>
- To: <shull@xxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 11 Jul 2005 11:27:09 -0700
Interesting, I just did a similar process last Friday (in prep for a
go-live)...
I used lsof to see all the open files for all Oracle processes on the DB
server. I then compared this with a sar -v output. I found that in my
situation it was easy to get a rough guess of the required number of
open file descriptor
(nfile Unix param) by simply multiply (number_of_datafiles x
number_of_dedicated_server_process). It's a rough enough guess but
works...Not sure if you wanted/needed something much more exact than
that...
Thanks!
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Sean Hull
Sent: Monday, July 11, 2005 11:13 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: unix - calc file descriptors
I'm wondering how to calculate the number of file descriptors Oracle
will
use on Unix. Obviously there will be one file descriptor for each file,
and for each socket (connection through listener). How about for IPC
connections? How about for Oracle processes (oracle executable file)?
I'm assuming device files aren't counted, as the OS or root user has
those
mounted & open.
Perhaps someone could point me to a document, or metalink reference
which
details this.
Thx.
Sean
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