Re: Oracle on windows and shadow thread file access

None...only the oracle background processes (threads in Winblows) access the datafiles/logfiles etc. All other communication is done through the SGA. On some Unix variants you _can_ reach a file_open max kernel parameter because each process (in a dedicated server scenario) opens it's own stdin/stdout/stderr. I guess the same could be true of processes running under windows too. So in the limit...you could hit a wall but only due to the per-process overhead.

Cheers

Jeff Herrick

On Fri, 29 Nov 2002, Grant Allen wrote:

> Saw an interesting post in comp.databases.oracle.server postulating that if
> a shadow thread needed an open file handle on all files in a instance (or
> even some of them), the process handle limit in windows could constrain user
> scalability (e.g. too many users would result in ora-12500 unable to spawn
> errors and the like). (Let's ignore MTS/shared server mode for the moment)
>
> Sounded interesting, but I thought I'd ask if anyone knows whether a shadow
> thread (or process under unix) does open a handle on each file (control,
> data, redo), some of them, or none of them?
>
> Ciao
> Fuzzy
> :-)
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Grant Allen
> INET: grant_at_towersoft.co.uk
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jeff Herrick
  INET: jherrick_at_igs.net

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).