Re: ROW CACHE HIGH - Priority 1

2003-09-25 Thread Sam Roberts
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Re: RMAN NETBACKUP recovering from say 6 MONTHS ago

2002-06-11 Thread Sam Roberts
Title: RE: RMAN NETBACKUP recovering from say 6 MONTHS ago



Thanks Tony
This is how I imagined it would work, yet the SYS ADMins are 
saying that there is no request for tape in the logs. Im in a different location 
so I guess I will have to travel to the other side of town and look myself. You 
dont know the directory of the logs do u by chance. I dont actually have access 
to the netbackup server so I am not familiar with its file 
locations
Thanks again
Sam

  - Original Message - 
  From: 
  Aponte, Tony 
  To: Multiple recipients of list ORACLE-L 
  
  Sent: Monday, June 10, 2002 9:03 PM
  Subject: RE: RMAN NETBACKUP recovering 
  from say 6 MONTHS ago
  
  Netbackup has a repository that keeps track of what files are 
  on which tapes, dates, sizes, volumes, serial number, etc. Depending on 
  how you are restoring the files, Netbackup gets a request to get a file name 
  (as it is know on tape) and checks it's catalog for the entry. The 
  bprestore process (or whatever it's called on your platform) sends a request 
  in a proprietary format to the media manager host. You (or your SA) can 
  look at the Netbackup logs or use bpmon to view the details for the request, 
  including the tape label.
  The hang you are seeing is actually controlled by a timeout 
  setting. Once the request is made for loading of a tape, the restore 
  process is at the mercy of whatever mounter is used on the media manager host 
  (robot, tape jockey, etc.) The timer expires, signals the bprestore and 
  lets it exit gracefully returning an exit code in the process. Use this 
  exit code to determine what the caused timeout; it's in the Veritas Netbackup 
  manual. I bet the error code is for "media not found and timer expired" 
  or something like that since the request isn't failing right away (which would 
  mean that the tape was explicitly expired and the catalog entries updated to 
  reflect the changes.) 
  HTH Tony Aponte 
  -Original Message- From: 
  [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] 
  Sent: Monday, June 10, 2002 4:18 AM To: Multiple recipients of list ORACLE-L Subject: RMAN NETBACKUP recovering from say 6 MONTHS ago 

  I want to alternate host my database to 6 months ago: The 
  media manager only keeps 2 months of data online and 
  when i recover until etc.. the job hangs and then 
  finally gives up, obviously as the tape is not inside: My question is how does Netbackup know which tape to load, or how do I 
  know which tape to put in the media manager or which 
  range of tapes: Anybody an help with this 
  Thanks 
  Sam 
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Re: Do you use RMAN?

2002-03-06 Thread Sam Roberts

I use RMAN with veritas Netbackup and it is sweet. Recovery  is ridiculously
easy: Even recovering to an alternative host (not as fast as cloning) is a
doddle and u can apply redo logs to the recovery to bring it up to current
time: All in all well worth the learning curve to set up

- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Wednesday, March 06, 2002 9:03 PM


hmmm, the question of the day, a good one!  I don't use it now but plan on
using it.  The question is when :)

 [EMAIL PROTECTED] 03/06/02 10:48AM 
Hi,

I'm in the process of upgrading my database to 9i and I was trying to
decide whether I wanted to change my backup strategy to use RMAN. Do most of
you use it? If you use it, what is your opinion of it? If you don't use it,
why did you decide not to?


Bill Carle
ATT
Database Administrator
816-995-3922
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Re: ORA-01000: maximum open cursors exceeded

2002-02-08 Thread Sam Roberts

no performance impact whatsoever .

I have various Java applications that require huge number of cursors and i
have limit set to 7500 without any issues

Sam


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Sent: Friday, February 08, 2002 5:03 PM


We had this error show up the other day. I am wondering if there is a
performance limit on how big you should set your OPEN_CURSORS parameter in
the SID.init file?  Mine currently is set at 300.  Are there any guidelines
on this setting?  Just wondering.

Thanks,

Dave
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Re: Re: OUTLN

2002-02-04 Thread Sam Roberts

and your point igor !


- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Monday, February 04, 2002 8:16 PM


 Interesting observation:

 Listers are much less objecting to answer some really 'simple' questions
 (which could be RTFMed), if those questions touch upon relatively new
oracle
 features (like OUTLN).

 Should have to do with people's curiosity?

 Igor Neyman, OCP DBA
 [EMAIL PROTECTED]


 - Original Message -
 To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
 Sent: Monday, February 04, 2002 10:35 AM


 
  Ron,
 
  The OUTLN user is for administering a new 8i feature called stored
  outlines.
 
  Stored outlines allow you to save away current execution paths as they
  exist
  today, if you want to.   Then, if things get hosed up in the future and
  your
  execution path mysteriously changes and you can't get it back to the way
 it
  was,
  you can load up your stored outline and force the optimizer to use the
old
  execution path.  This feature does not get implemented automatically.
  It requires some configuration and administration to actually use stored
  outlines.
 
  Cherie Machler
  Oracle DBA
  Gelco Information Network
 
 
 
  Smith, Ron
  L.  To: Multiple recipients of
 list ORACLE-L [EMAIL PROTECTED]
  [EMAIL PROTECTED]   cc:
  om  Subject: OUTLN
  Sent by:
  [EMAIL PROTECTED]
  om
 
 
  02/04/02 08:50
  AM
  Please respond
  to ORACLE-L
 
 
 
 
 
 
  Can anyone tell me what the OUTLN user is for?
 
  Ron Smith
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Re: Number_of_rows

2002-01-31 Thread Sam Roberts

rtfm
- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Friday, January 25, 2002 10:20 PM


 Hallo all  you gurus,

 How can I write in the pl/sql code if I want to insert in a table the
number of rows that are inserted in the select statement in the procedure?
 Give me a good example, please.

 Thanks in advance



 Roland S

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Re: RTFM questions (formally RE: PL/SQL)

2002-01-29 Thread Sam Roberts
://www.orafaq.com
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Re: Sending mail using pl/sql

2002-01-25 Thread Sam Roberts

U can e-mail me @ [EMAIL PROTECTED] to remind me:
I have real life examples I can send u: Today is holiday in middle east
where I work: I will be at work tomorrow and I will send them

Sam

- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Friday, January 25, 2002 4:40 PM


 Hi All,

 I know it has been asked many times but I have changed jobs and no longer
 have old e-mail. Anyway I need to know
 how to send e-mail using pl/sql with attachments. Any real
 examples,links,references would be very helpful.
 My environment is Oracle NT 8.1.6 SE, NT 4.0, client is Win 2000

 Thanks
 Rick


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Re: Solaris 8 Question

2001-07-24 Thread Sam Roberts

This happened to me today: Solaris 5.8
we have a large data load exercise going on and the archive log directory
filled - database stopped of course.
but after I had moved all the archive logs to another location the system
still hung - I tried manual switching of log file ,still hung.
I had to stop and start instance - I was surprised. did I miss something ?

sam


- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Friday, July 20, 2001 2:15 PM


If it's / or /tmp, then yes, your machine could well become unusable
until it gets some free space. If your archive log disk fills, Oracle
will refuse transactions until there is free space. Read the man page
for 'quota' to help you limit the possibility of this. And think about
switching autoextend off.

Cheers,

g


-Original Message-
Sent: Thursday, July 19, 2001 4:10 PM
To: Multiple recipients of list ORACLE-L


Hi all,
A friend of mine is having a problem so I thought I would ask
all of you
experts a quick question.  On a Solaris 8 box running 8.1.7, if a
partition
fills up, will it crash the box?  I know that on NT this is very
possible
depending on pagefile and what file is filling up the partition.  But I
don't know anything about Sun.  Thanks alot:)

Sincerely,
Kevin Kostyszyn
DBA
Dulcian, Inc
www.dulcian.com
[EMAIL PROTECTED]

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stopping applications connecting to a database

2001-07-21 Thread Sam Roberts

is there any way (apart from running a reoccuring scripts ) to stop users
from accessing the database with software such as msaccess.exe


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Re: how to find highest process useing more CPU

2001-06-19 Thread Sam Roberts

/usr/ucb/ps -uax


This will give u the /son of a b***'s'  taking the most CPU

Sam





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To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Tuesday, June 19, 2001 9:13 PM


 On Tue, Jun 19, 2001 at 08:46:04AM -0800, Seema Singh wrote:
  Hi
  Is there any way to find which process is taking much cpu except top
command
  on Solaris Unix.
  If some one have any script let me know.
  With regards
  -Seema

 Try looking up the documentation for ps

 for example...
 ps -e -o pcpu,pid,user,args | sort -nr | head


 --
 Tommy Wareing
 Software Engineer
 Oxford English Dictionary

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Semaphores

2001-06-16 Thread Sam Roberts

Oracle Financials 11i asks for 14000 semaphores:

When I do the calculation as per the Oracle Guide  I come to about 1000.

Anybody know why the disparate nature of these numbers. Can semaphores be
set to such high levels.

I can RTFM, but wonder what lists comments are before

Sam

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Re: OFA Question

2001-06-08 Thread Sam Roberts

No reason - 

Sam

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Sent: Thursday, June 07, 2001 12:50 PM


 Hi All
 
 Running Oracle 817 on Red Hat Linux.  File layout is as follows.
 
 oradata3/prod:
 control01.ctl  indx01.dbf  redo01.log  system01.dbf  tools01.dbf
 
 oradata4/prod:
 control02.ctl  redo02.log  temp01.dbf
 
 oradata6/prod:
 control03.ctl  rbs01.dbf  redo03.log
 
 oradata7/prod:
 redo01b.log  users01.dbf
 
 oradata8/prod:
 archives  redo02b.log
 
 oradata9/prod:
 archives  redo03b.log
 
 Where archives is a dir containing online dbf backups and archived redo
 logs.  
 
 Is there ANY reason at all not to use spare space on oradata 3,4,6,7 to
 store other files ?  They won't be read or written during times when the
 database is under load.
 
 Cheers
 GS
 
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Re: Which SQL is executing

2001-06-04 Thread Sam Roberts



SELECT T.SQL_TEXT FROM V$SQLTEXT T,V$SESSION S 
WHERE S.SQL_ADDRESS=T.ADDRESS ORDER BY T.PIECE;

Sam

  - Original Message - 
  From: 
  Chuan 
  Zhang 
  To: Multiple recipients of list ORACLE-L 
  Sent: Monday, June 04, 2001 9:30 AM
  Subject: Which SQL is executing
  
  Hi All,
  
  
  From v$open_cursor, I know every SQL opened 
  and parsed in one session. Is there any way to know which SQL is running. Or 
  put another way, canall the SQLs in one session be sorted in timing 
  order dynamically?
  
  Any clue would be much appreciated.
  
  Chuan


Re: OFA New Installation

2001-06-04 Thread Sam Roberts


 I'm setting up an 8i solaris installation on ha-cluster with disk array and
  veritas vol manger.
  I've only got 10 18gb disks (mirrored) for my prod/test/dev environments.
I
 will  OFA the Prod only. Data + Index  Approx 30GB
  I'll use RAID 1 for disks 1-5   RAID 1+0 for Disks 6-10.
  my disk config - any comments greatly appreciated

  Disk1 -  Control01.ctl system01 temp01 rbs01 /prodbinaries
  DIsk2 -  Control02.ctl Redo01a Redo02a Redo03a
  Disk3 -  Control03.ctl Redo01b Redo02b Redo03b
  Disk4 -  /devRedo01c Redo02c Redo03c tools
  Disk5 -  /arch  /test1
  Disk6 - data
  Disk7 - data
  Disk8 - data
  Disk9 - index
  Disk10   - index

  issues - temp and rbs on same - ive guess its okay if sorts mainly in
 memory
  - redo01 02 03 on same drive - I know contention when arching
but ..
  - I have to find room for at least 1 clone of production pref
2


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Fw: OFA New Installation

2001-06-03 Thread Sam Roberts

 I'm setting up an 8i solaris installation on ha-cluster with disk array and
 veritas vol manger.
 I've only got 10 18gb disks (mirrored) for my prod/test/dev environments. I
will
 OFA the Prod only. Data + Index  Approx 30GB
 I'll use RAID 1 for disks 1-5   RAID 1+0 for Disks 6-10.
 my disk config - any comments greatly appreciated

 Disk1 -  Control01.ctl system01 temp01 rbs01 /prodbinaries
 DIsk2 -  Control02.ctl Redo01a Redo02a Redo03a
 Disk3 -  Control03.ctl Redo01b Redo02b Redo03b
 Disk4 -  /devRedo01c Redo02c Redo03c tools
 Disk5 -  /arch  /test1
 Disk6 - data
 Disk7 - data
 Disk8 - data
 Disk9 - index
 Disk10   - index

 issues - temp and rbs on same - ive guess its okay if sorts mainly in
memory
 - redo01 02 03 on same drive - I know contention when arching
   but ..
 - I have to find room for at least 1 clone of production pref 2

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Re: 4 join methods?

2001-06-02 Thread Sam Roberts



I did have to RTFM - 

A cluster join is nothing more than a nested loops join 
involving two tables that are stored together in a cluster. Because each row 
from the dept table is stored in the same data blocks as the 
matching rows in the emp table, Oracle can access matching rows 
most efficiently

Sam

  - Original Message - 
  From: 
  Vadim Gorbounov 
  To: Multiple recipients of list ORACLE-L 
  Sent: Friday, June 01, 2001 6:25 PM
  Subject: RE: 4 join methods?
  
  Hi, 
  DBAs,
  RTFM is so 
  boring, but... There is cutpaste from 
  "Oracle8i Designing and Tuning for 
  Performance" 
   The 
  Optimizer
   Optimizing 
  joins
  
  
  


  
Join 
Operations
  
To join each pair of row sources, 
Oracle must perform one of these operations: 

  Nested Loops (NL) Join 
  
  Sort-Merge Join 
  
  Hash Join (not available with the RBO) 
  
  Cluster Join 
  
  Cheers,
  Vadim 
  Gorbounov
  Oracle DBA 
  


2 batch jobs kill performance

2001-06-02 Thread Sam Roberts

There is a site www.hotsos.com and a paper about why 2 batch jobs kill
system performance. The paper is protected so is there anybody on the list
who can explain this, Im very curious

thanks

Sam




- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Sunday, June 03, 2001 6:15 AM


 Jared Still wrote:
 
  Same old FUD.  Try to associate your competition with
  a scary word and make them a pariah.
 
  McCarthyism in the 50's, Balmerism in the 00's.
 
  Jared
 
  On Friday 01 June 2001 14:17, Jamadagni, Rajendra wrote:
   Read the story here
   (urlhttp://www.suntimes.com/output/tech/cst-fin-micro01.html/url)
and
   have a good laugh.
  
   LOL! TGIF
   Raj

 This is not an email that I would normally post to the list - but since
 its the weekend - why not?


 Jared,

 The GPL has been referred to as a virus previously, due to inclusion
 of GPL code causing the entire piece of code (at the execution unit) to
 be required to be released under the same license.

 I have a problem with this section of the article:

 snip
 Q: Do you view Linux and the open-source movement as a threat to
 Microsoft?

 A: Yeah. It's good competition. It will force us to be innovative. It
 will force us to
 justify the prices and value that we deliver. And that's only healthy.
 The only thing
 we have a problem with is when the government funds open-source work.
 Government funding should be for work that is available to everybody.
 Open source
 is not available to commercial companies. The way the license is
 written, if you use
 any open-source software, you have to make the rest of your software
 open source.
 If the government wants to put something in the public domain, it
 should. Linux is not
 in the public domain. Linux is a cancer that attaches itself in an
 intellectual property
 sense to everything it touches. That's the way that the license works.
 snip

 Open Source != GPL.
 The GPL is one license - there are many like it, many unlike it.
 http://www.fsf.org/philosophy/license-list.html#GPLCompatibleLicenses

 Here is an article by Stallman
 http://www.cnn.com/TECH/computing/9911/08/freedom.GNU.idg/

 Linus Torvalds chose the GPL so that no one could own Linux.
 There are other licenses that can be used for Free Software or Open
 Source Software, such as the LGPL, Apache and BSD Artistic License. I've
 heard rumors that much of the TCP/IP stack in Windows 2000 has its
 origins in FreeBSD code - licensed under the BSD license.

 To Balmer - if Microsoft cannot own it - it is evil - and should not
 be funded.
 As not all Open Source work is licensed under the GPL, his statement is
 overly broad and therefore false.

 Paul
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Re: 4 join methods?

2001-06-01 Thread Sam Roberts

They are basically the same I agree
but for clarification
an inner join is a join where rows from one table are joined to rows from
another table based on some common values, an equi join is one in which the
equals operator is used to directly relate two values.
I can see the difference in business terms - if you disagree take the
argument up with the likes  of guy harrison et al.
cause to quote rhett, frankly my dear, I don't give a (damn('flying duck'))

Sam




- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Friday, June 01, 2001 5:40 PM


 inner join and equijoin are the same

 Walking on water and developing software from a specification are easy if
 both are frozen.

 Christopher R. Spence
 Oracle DBA
 Fuelspot



 -Original Message-
 Sent: Friday, June 01, 2001 1:26 AM
 To: Multiple recipients of list ORACLE-L


 There are 5 join operations
 inner join
 equi-join
 outer-join
 anti-join
 self-join

 and 3 join methods
 neted loop
 sort merge join
 hash join


 sam


 - Original Message -
 To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
 Sent: Thursday, May 31, 2001 10:55 AM


  1. Equi-join 2. Self-join 3. Outer-join  4. Hash-join
 
  rukmini
  - Original Message -
  To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
  Sent: Thursday, May 31, 2001 11:20 AM
 
 
   i feel the fourth one is self join.
  
   - Original Message -
   To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
   Sent: Thursday, May 31, 2001 8:10 AM
  
  
Hi,
   
I just read there are four join methods.  I know three:
   
Nested loops
Sort merge
Hash join
   
What's the fourth?
   
- Greg
   
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Re: Re[2]: 4 join methods?

2001-05-31 Thread Sam Roberts

Star join or STAR SCHEMA is used for DSS Systems. It actually uses Cartesian
product in its methodology
but still employs Oracle join methods to actually do the joins between the
tables. So there are still 3 join methods.Cartesian (as somebody mentioned
earlier is product rather than a join)

Sam

p.s. not sure what 9i will has

- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Friday, June 01, 2001 12:09 AM


 On Thursday 31 May 2001 06:41, [EMAIL PROTECTED] wrote:
  I wonder if their thinking of the star join??
 
  Dick Goulet

 Isn't that actually just a sort merge?

 Just guessing here, didn't RTFM.

 No flames please!  :)

 Jared
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Re: Help on query

2001-05-22 Thread Sam Roberts

That was too funny

- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Tuesday, May 22, 2001 12:46 PM


 SELECT DISTINCT std_no
 FROM exam
 WHERE POINT IN ('A','B');

 At 12:00 AM 5/22/2001 -0800, you wrote:

 Dear gurus,
 
 I have a table :
 Tabel Exam
 STD_NO SUBJECT POINT
 == === =
 001CHEM A
 001PHYSIC   A
 001BIOLOGY  A
 
 002CHEM A
 002PHYSIC   B
 002BIOLOGY  A
 
 003CHEM A
 003PHYSIC   A
 003BIOLOGY  B
 
 What is the SQL query to retrieve STD_NO which have CHEM = A and PHYSIC =
A?
 
 The output should be :
 STD_NO
 ==
 001
 003
 
 TIA,
 
 Ahmadsyah Alghozi Nugroho
 Database Engineering Specialist
 PT Infoglobal AutOptima
 Jl. Baruk Tengah I/49
 Surabaya - Jawa Timur
 INDONESIA
 phone : +62 (31) 8708456 ext.113
 visit [ORAID!] http://oraid.iwarp.comhttp://oraid.iwarp.com

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Multiple schema's or multiple databases

2001-05-22 Thread Sam Roberts



Oracle 8.1.6 and Solaris
I'm going to inherit production databases when I start my new 
job next week. I gather that the production database consists of 8 schema's (8 
companies) that are all in one database. Its an ERP package called Maximo and it 
interfaces to Financials 11i databases (don't know if this is multiple databases 
or schema's yet).
Apparently there is some data passing between companies and 
multiple schema's perform better than using database links with multiple 
databases, and this is the reason for multiple schema's.
Does anyone have an opinion on this. If I'd have done it I 
would have done multiple databases as they are separate companies, but I'm open 
to comments as not quite got my head round it yet, plus I've been vacationing 
(partying) for 3 weeks.

Thanx

Sam



Re: Free Java dba monitoring tool and Java source code

2001-05-22 Thread Sam Roberts
Title: Free Java dba monitoring tool and Java source code



lisa
I posted about a java SQL monitoring tool that I developed. 
The source code is also available - please e-mail me offline for 
details

Sam

  - Original Message - 
  From: 
  Yttri, Lisa 
  
  To: Multiple recipients of list ORACLE-L 
  Sent: Tuesday, May 22, 2001 11:55 
PM
  Subject: Free Java dba monitoring tool 
  and Java source code
  
  Hi - 
  There was a post a couple of months ago from someone who had 
  written this java tool and you could e-mail him to get a copy. Does 
  anyone have his e-mail or a web site where the software can be 
  found?
  Thanks - Lisa 



Re: Multiple schema's or multiple databases

2001-05-22 Thread Sam Roberts



Off the top of my head I can see this problem also. Is there 
anyone who is expert at recovery has a view.
Dick - how can you consolidate 8 companies into one schema - 
they probably all have different inventories,equipmet etc.. + all have their own 
interface to Oracle Financials.

Sam 

  - Original Message - 
  From: 
  John 
  Lewis 
  To: Multiple recipients of list ORACLE-L 
  Sent: Wednesday, May 23, 2001 3:36 
  AM
  Subject: RE: Multiple schema's or 
  multiple databases
  
  Something to ponder. The archive logs are tied to the 
  system. Thus, if you want torecover to a point in time for a 
  multi-schema /one instance system, if one schema gets rolled back 
  - everything gets rolled back.
  
  We 
  had this same issue. Perhaps someone knows a way around 
  this.
  
-Original Message-From: Christopher Spence 
[mailto:[EMAIL PROTECTED]]Sent: Tuesday, May 22, 2001 2:26 
PMTo: Multiple recipients of list ORACLE-LSubject: RE: 
Multiple schema's or multiple databases
1. Is that performance gain absolutely 
necessary?

What happens if one company goes down and takes down them 
all.


On 
another note, I tend to agree on lesser instances against more 
instances. Easier to tune, better perforamance due to what I call 
instance wastage and much easier to maintain. But if one system 
changes alot, has significiantly different access methods, or goes up and 
down more than anyone, I would evaluate seperate 
instances.


  -Original Message-From: Sam Roberts 
  [mailto:[EMAIL PROTECTED]]Sent: Tuesday, May 22, 2001 1:41 
  PMTo: Multiple recipients of list ORACLE-LSubject: 
  Multiple schema's or multiple databases
  Oracle 8.1.6 and Solaris
  I'm going to inherit production databases when I start 
  my new job next week. I gather that the production database consists of 8 
  schema's (8 companies) that are all in one database. Its an ERP package 
  called Maximo and it interfaces to Financials 11i databases (don't know if 
  this is multiple databases or schema's yet).
  Apparently there is some data passing between companies 
  and multiple schema's perform better than using database links with 
  multiple databases, and this is the reason for multiple 
  schema's.
  Does anyone have an opinion on this. If I'd have done it 
  I would have done multiple databases as they are separate companies, but 
  I'm open to comments as not quite got my head round it yet, plus I've been 
  vacationing (partying) for 3 weeks.
  
  Thanx
  
  Sam
  


Re: DB Link Between Prod and Test?

2001-05-15 Thread Sam Roberts

My concern with that would be the performance aspect. Giving someone access
to run un optimized queries in Production could affect the overall response
time. I would not allow it personally, plus if you allow it for one ,you've
set a precedent

Sam

- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Tuesday, May 15, 2001 11:00 PM


 If all he needs is select he cannot corrupt the DB if the DBA does not
grant
 unnecessary privileges. Folks
 use dblinks all the time.

 Rick

 -Original Message-
 Sent: Tuesday, May 15, 2001 2:26 PM
 To: Multiple recipients of list ORACLE-L


 One of our development DBAs suggested today to build a private database
 link between production and test database so that he can run some
 queries against both at the same time. I am a little concerned because he
 might make a mistake and accidentally corrupt the prod database. Anybody
 out there who is doing the same thing? Are there any other potential
 ramifications?
 TIA
 Dennis Meng
 Database Administrator
 Focal Communications
 847-954-8328

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Re: consistency in cost?

2001-05-08 Thread Sam Roberts

If the system is Rule based and you code Hints, the CBO will be
automatically invoked
Sam


- Original Message -
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Sent: Tuesday, May 08, 2001 10:12 PM


 Forgive my ignorance but I thought hints were only for cost based
optimizer.


 Have you checked in case anybody has changed any parameters while the
system
 is running as I know that changing the hash_area_size can change the
 execution plan?.  Are you using parallelism as if a table had to be
 recreated for any reason and its degree changed it might do a FTS?

 Cheers

 Iain Nicoll


 -Original Message-
 Sent: 08 May 2001 17:31
 To: Multiple recipients of list ORACLE-L


 Jared,
 The only difference is about a weeks worth of extra data. Well, the
hardware
 is also different (Ultra450 vs. Ultra 5000. Also 1 vs 4 CPU). But
 regardless, shouldn't init.ora optimizer_mode=choose be identical to
 optimizer_mode=rule with hint=choose? If I have the time, I'll try to set
up
 a couple of systems and examine by moving stats and taking some 10053
dumps.
 (one of the ones giving me a problem is in production so I have limited
play
 time there).

 Henry

 -Original Message-
 Sent: Tuesday, May 08, 2001 12:56 AM
 To: [EMAIL PROTECTED]; Henry Poras



 Henry,

 You say 'nearly identical'.

 What are the differences?

 Are the 2 databases on the same platform?

 If not, what are the differences, hardware and OS?

 Jared


 On Monday 07 May 2001 21:55, Henry Poras wrote:
  I am working with an 8.1.6 database on Solaris 2.6 and I am wondering if
  there is any consistency in the optimizer. We have two nearly identical
  databases (one a clone from two weeks ago). A five table join has nearly
  the identical execution plan on the two databases. The difference is in
 the
  access method of the fourth table in the join; in one case it is
accessed
  by a FTS and in the other, by Index. This difference has a large effect
on
  performance. Statistics are nearly identical for this table in both
  databases (I looked at dba_tables, dba_indexes, dba_col_tables). Also,
the
  init.ora is the same. When I changed the optimizer_mode to rule and
added
 a
  'choose' hint to the query, the execution plan was different again. I
will
  look into this a bit further and post my results. Just wondering about
  other's experiences. Thanks.
 
  Henry
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-- 
Author: Sam Roberts
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