Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: shmmax vs. SGA

Re: shmmax vs. SGA

From: Sakthi , Raj <rajan_sakthi_at_yahoo.com>
Date: Tue, 29 May 2001 11:16:58 -0700
Message-ID: <F001.003124E4.20010529110118@fatcity.com>

JM ,
check metalink following metalink note , Note:15566.1
Regards
RS
--- "Miller, Jay" <JayMiller_at_TDWaterhouse.com> wrote:
> Hi all,
>
> We had gotten some extra memory for our production
> server and I was trying
> to increase our buffer cache again (I was leery of
> doing it all at once so I
> just doubled it the first time). I got a
> ORA-27123: unable to attach to shared memory segment
> with my first try (it worked after I reduced the
> buffer cache a bit) and I'm
> trying to figure out why.
>
> Total memory on the machine is 4Gig.
>
> shmmax=2048000000 (2000M)
>
> 4K Block size
>
> I was able to start the database with a
> db_block_buffers of 350000 but not
> of 400000.
>
> Current SGA:
> NAME VALUE
> -------------------- ----------
> Fixed Size 47296
> Variable Size 248659968
> Database Buffers 1433600000
> Redo Buffers 1040384
>
> This gives a total of 1605M which should leave 295M
> still available. An
> extra 50000 blocks is only 195M. Is there something
> other than the total in
> v$sga that counts towards the shmmax? I can't find
> anything in my Oracle8 &
> Unix Performance Tuning book.
>
> Thanks for any guidance!
>
> Jay Miller
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> --
> Author: Miller, Jay
> INET: JayMiller_at_TDWaterhouse.com
>
> Fat City Network Services -- (858) 538-5051 FAX:
> (858) 538-5051
> San Diego, California -- Public Internet
> access / Mailing Lists
>



> 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).


Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Sakthi , Raj
  INET: rajan_sakthi_at_yahoo.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
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).
Received on Tue May 29 2001 - 13:16:58 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US