- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Rollback segment issue !!
Operating System - HP-UX
1753830
Members
9610
Online
108806
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-22-2002 05:24 AM
тАО07-22-2002 05:24 AM
Rollback segment issue !!
Hi all,
I have a question for Rollback segment!!
Suppose I have a table "ABC" which contains 100M data. If my rollback segment tablespace contains 1 datafile which is 50MB. There are 2 rollback segments (Non-System) defined with autoextend off. Each with storage paramter (inital 1M next 1M minextent 10 maxextent 50)
What happen if:
1. I issue a sql command "select * from ABC'"??
2. I issue a sql command "select * from ABC where x='123';" Suppose the result set contains only 30 MB of data.
Cheers,
Chris,
I have a question for Rollback segment!!
Suppose I have a table "ABC" which contains 100M data. If my rollback segment tablespace contains 1 datafile which is 50MB. There are 2 rollback segments (Non-System) defined with autoextend off. Each with storage paramter (inital 1M next 1M minextent 10 maxextent 50)
What happen if:
1. I issue a sql command "select * from ABC'"??
2. I issue a sql command "select * from ABC where x='123';" Suppose the result set contains only 30 MB of data.
Cheers,
Chris,
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-22-2002 05:48 AM
тАО07-22-2002 05:48 AM
Re: Rollback segment issue !!
Rollback segments are used when you are updating, deleting, or inserting data. The result set of an insert statement will not be affected by the size of your rollback segements.
The problem you need to watch out for is if you are running select statements while also performing inserts, updates, and deletes. Once the rollback segement is filled up with transactional data that has not yet been committed or rolled back - your dml may fail, or your queries could die with snapshot too old.
The problem you need to watch out for is if you are running select statements while also performing inserts, updates, and deletes. Once the rollback segement is filled up with transactional data that has not yet been committed or rolled back - your dml may fail, or your queries could die with snapshot too old.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-22-2002 01:55 PM
тАО07-22-2002 01:55 PM
Re: Rollback segment issue !!
Jeanie is correct. You are thinking of sorting, which is done by the temporary tablespace. This is defined by the "temporary_tablespace" setting under "dba_users" for your user.
Rollback segments would be used in something like the following:
insert into DEF select * from ABC where x='123'
Brian
Rollback segments would be used in something like the following:
insert into DEF select * from ABC where x='123'
Brian
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-23-2002 12:52 AM
тАО07-23-2002 12:52 AM
Re: Rollback segment issue !!
Hi Chris,
if you have access to Oracle Metalink (you should if you have an active support contract), you can search for "optimizing rollback segments" - Select doc id 107085.1
This doc contains pointers to others documents on same subject.
Jean-Luc
if you have access to Oracle Metalink (you should if you have an active support contract), you can search for "optimizing rollback segments" - Select doc id 107085.1
This doc contains pointers to others documents on same subject.
Jean-Luc
fiat lux
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP