RE: OID Perfomance - Object-Relational databases

-----Original Message-----
From: Michael Ansley [mailto:Michael.Ansley@intec-telecom-systems.com]
Sent: 03 October 2000 17:36
To: 'Mitch Vincent'
Cc: sqllist
Subject: RE: [SQL] OID Perfomance - Object-Relational databases

Unsigned, I think you can double it, although I haven't applied much thought to this, so I could well be wrong.

>>   -----Original Message-----
>>   From: Mitch Vincent [mailto:mitch@venux.net]
>>   Sent: 03 October 2000 17:35
>>   To: Michael Ansley
>>   Cc: sqllist
>>   Subject: Re: [SQL] OID Perfomance - Object-Relational databases
>>  
>>  
>>   Aren't OIDs just integers? Isn't this limit just the limit
>>   of the value an
>>   int4 can hold?
>>  
>>   2,147,483,647 is the max for an int4 (I think) so at 500
>>   million a day
>>   you're looking at more like  4.29 (and change) days
>>  
>>   If I'm correct in all the above, there wouldn't be any way
>>   to increase the
>>   limit without the server running on a 64-bit machine
>>   (which you could do, I
>>   guess)..
>>  
>>   *shrug* just some thoughts..
>>  
>>   -Mitch
>>  
>>   ----- Original Message -----
>>   From: "Michael Ansley" <Michael.Ansley@intec-telecom-systems.com>
>>   To: <josh@agliodbs.com>; "sqllist" <pgsql-sql@postgresql.org>
>>   Cc: "Jeff MacDonald" <jeff@pgsql.com>
>>   Sent: Tuesday, October 03, 2000 9:17 AM
>>   Subject: RE: [SQL] OID Perfomance - Object-Relational databases
>>  
>>  
>>   > Hi, Josh,
>>   >
>>   > In fact, the last point about OIDs is particularly
>>   pertinent, because we
>>   are
>>   > expected to process up to 500 million records daily,
>>   thus exhausting the
>>   > limit in, um, eight days.
>>   >
>>   > Is anybody aware of when this limit will be raised.
>>   >
>>   > Cheers...
>>   >
>>   > >>   -----Original Message-----
>>   > >>   From: Josh Berkus [mailto:josh@agliodbs.com]
>>   > >>   Sent: 03 October 2000 17:06
>>   > >>   To: sqllist
>>   > >>   Cc: Jeff MacDonald
>>   > >>   Subject: [SQL] OID Perfomance - Object-Relational databases
>>   > >>
>>   > >>
>>   > >>   Folks,
>>   > >>
>>   > >>   Because it's a very elegant solution to my database
>>   > >>   structure issues,
>>   > >>   I'm using OID's extensively as referents and foriegn keys.
>>   > >>    However, I
>>   > >>   wanted to see if others had previous experience in this
>>   > >>   (answer as many
>>   > >>   as you like):
>>   > >>
>>   > >>   1. Is there a performance loss on searches and joins when
>>   > >>   I use the OID
>>   > >>   as a liniking field as opposed to a SERIAL column?
>>   > >>
>>   > >>   2. Can I define my own index on the OIDs of a table?
>>   > >>
>>   > >>   3. What is the difference between these two DDL statements
>>   > >>   in terms of
>>   > >>   data access and PG-SQL performance (assuming that
>>   table clients has
>>   > >>   already been defined):
>>   > >>
>>   > >>   CREATE TABLE client_addresses AS (
>>   > >>   client_OID OID REFERENCES clients,
>>   > >>   address1 VARCHAR (30),
>>   > >>   address2 VARCHAR (30),
>>   > >>   address3 VARCHAR (30)
>>   > >>   )
>>   > >>   and:
>>   > >>   CREATE TABLE client_addresses AS (
>>   > >>   client clients,
>>   > >>   address1 VARCHAR (30),
>>   > >>   address2 VARCHAR (30),
>>   > >>   address3 VARCHAR (30)
>>   > >>   )
>>   > >>
>>   > >>   (This is Michael's questions rephrased)
>>   > >>
>>   > >>   4. Int4 seems kinda small to me for a value that
>>   needs to enumerate
>>   > >>   every single database object.  Within a couple of years of
>>   > >>   heavy use, a
>>   > >>   customer-transaction database could easily exceed 2
>>   billion objects
>>   > >>   created (and destroyed).  Are there plans to expand
>>   this to Int8?
>>   > >>
>>   > >>   -Josh Berkus
>>   > >>
>>   > >>   P.S. My aplolgies if I've already posted these
>>   questions; I never
>>   > >>   received them back from the list mailer.
>>   > >>
>>   > >>
>>   > >>
>>   > >>   --
>>   > >>   ______AGLIO DATABASE SOLUTIONS___________________________
>>   > >>                                           Josh Berkus
>>   > >>      Complete information technology      josh@agliodbs.com
>>   > >>       and data management solutions       (415) 436-9166
>>   > >>      for law firms, small businesses       fax  436-0137
>>   > >>       and non-profit organizations.       pager 338-4078
>>   > >>                           San Francisco
>>   > >>
>>   >
>>