Informix News
18 Nov 13 - ZDNet - Top 20 mobile skills in demand... Read
09 Sep 13 - telecompaper - Shaspa and Tatung have shown a new smart home platform at Ifa in Berlin. Powered by the IBM Informix software... Read
06 Sep 13 - IBM data magazine - Mission Accomplished - Miami, Florida will be the backdrop for the 2014 IIUG Informix Conference... Read
01 Feb 13 - IBM Data Magazine - Are your database backups safe? Lester Knutsen (IBM Champion) writes about database back up safety using "archecker"... Read
14 Nov 12 - IBM - IBM's Big Data For Smart Grid Goes Live In Texas... Read
3 Oct 12 - The Financial - IBM and TransWorks Collaborate to Help Louisiana-Pacific Corporation Achieve Supply Chain Efficiency... Read
28 Aug 12 - techCLOUD9 - Splunk kicks up a SaaS Storm... Read
10 Aug 12 - businessCLOUD9 - Is this the other half of Cloud monitoring?... Read
3 Aug 12 - IBM data management - Supercharging the data warehouse while keeping costs down IBM Informix Warehouse Accelerator (IWA) delivers superior performance for in-memory analytics processing... Read
2 Aug 12 - channelbiz - Oninit Group launches Pay Per Pulse cloud-based service... Read
28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
14 Mar 12 - - International Informix User Group set to meet in San Diego... Read
1 Mar 12 - IBM Data Management - IIUG Heads West for 2012 - Get ready for sun and sand in San Diego... Read
1 Mar 12 - IBM Data Management - Running Informix on Solid-State Drives.Speed Up Database Access... Read
26 Feb 12 - - Better results, lower cost for a broad set of new IBM clients and partners... Read
24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
6 Feb 12 - PRLOG - Informix port delivers unlimited database scalability for popular SaaS application ... Read
2 Feb 12 - developerWorks - Loading data with the IBM Informix TimeSeries Plug-in for Data Studio... Read
1 Feb 12 - developerWorks - 100 Tech Tips, #47: Log-in to Fix Central... Read
13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
9 Jan 12 - - DNS impact on Informix / Impacto do DNS no Informix... Read
8 Sep 11 - - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
1 Aug 11 - IBM Data Management Magazine - IIUG user view: Happy 10th anniversary to IBM and Informix... Read
8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
14 Mar 11 - MarketWatch - Fuzzy Logix and IBM Unveil In-Database Analytics for IBM Informix... Read
11 Mar 11 - InvestorPlace - It's Time to Give IBM Props: How many tech stocks are up 53% since the dot-com boom?... Read
9 Mar 11 - DBTA - Database Administration and the Goal of Diminishing Downtime... Read
2 Feb 11 - DBTAs - Informix 11.7 Flexible Grid Provides a Different Way of Looking at Database Servers... Read
27 Jan 11 - exactsolutions - Exact to Add Informix Support to Database Replay, SQL Monitoring Solutions... Read
25 Jan 11 - PR Newswire - Bank of China in the UK Works With IBM to Become a Smarter, Greener Bank... Read
12 Oct 10 - Database Trends and Applications - Informix 11.7: The Beginning of the Next Decade of IBM Informix... Read
20 Sep 10 - - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
20 Jul 10 - IBM Announcements - IBM Informix Choice Edition V11.50 helps deploy low-cost scalable and reliable solutions for Apple Macintosh and Microsoft Windows... Read
20 Jul 10 - IBM Announcements - Software withdrawal: Elite Support for Informix Ultimate-C Edition... Read
24 May 10 - eWeek Europe - IBM Supplies Database Tech For EU Smart Grid... Read
23 May 10 - SiliconIndia - IBM's smart metering system allows wise use of energy... Read
21 May 10 - CNET - IBM to help people monitor energy use... Read
20 May 10 - ebiz - IBM Teams With Hildebrand To Bring Smart Metering To Homes Across Britain... Read
19 May 10 - The New Blog Times - Misurare il consumo energetico: DEHEMS è pronto... Read
19 May 10 - ZDNet - IBM software in your home? Pact enables five-city smart meter pilot in Europe... Read
17 March 10 - ZDNet (blog) David Morgenstern - TCO: New research finds Macs in the enterprise easier, cheaper to manage than... Read
17 March 2010 - Virtualization Review - ...key components of Big Blue's platform to the commercial cloud such as its WebSphere suite of application ser vers and its DB2 and Informix databases... Read
10 February 2010 - The Wall Street Journal - International Business Machines is expanding an initiative to win over students and professors on its products. How do they lure the college crowd?... Read

End of Support Dates

IIUG on Facebook IIUG on Twitter

[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

IDS Forum

Re: Fwd: Re: How to Reclaim Space in the chunks

Posted By: Martin Fuerderer
Date: Tuesday, 28 January 2003, at 3:38 a.m.

In Response To: Fwd: Re: How to Reclaim Space in the chunks (ART KAGEL, BLOOMBERG/ 65E 55TH)


1) Art S. Kagel is right, of course. :)
2) You have to re-organize the table to claim the newly "freed"
space. Unfortunately there's no easy way to do this.
Therefore you can/have to do the following :

a) save the table's data to some destination. This can be
- an unload file (UNLOAD TO ... SELECT ...);
but currently there's still the 2 GB file size limit.
- dbexport (which does basically the same thing), though
when done to tape you can have a size > 2 GB (not of
a single tape, that's 2 GB as well, but you can have more
than 1 tape ...),
- put the table's data into another table (temporarily needs
extra space in your server ...),
- I'm not 100% sure about "onunload" utility, but that might
work as well.
b) get the schema of the table,
c) drop the table,
d) re-create the table from the schema in b),
e) load the data from wherever you saved it to.

The table drop will free all extents of this table,
the create and load will allocate extents consecutively on disk
(as long as there's no other activity going on concurrently that
would also allocate extents in the same dbspace).

You may consider specifying some calculated (first) extent size(s)
when re-creating the table in step d). You have to estimate/calculate
from the amount of data you've saved or from the old table's size
versus free pages (do "oncheck -pT" on the old table before drop).

No need to drop/re-create the dbspace or chunk(s) of it.
Other tables/activities/sessions should not be affected (expect for
some performance penalty during the unload/export and load phases).

Martin Fuerderer
IBM Informix Development Munich
Data Management Solutions

"ART KAGEL, ...." <>
Sent by:
27.01.2003 17:34

Subject: Fwd: Re: How to Reclaim Space in the chunks [130]

This will not work! Restoring an archive restores all of the pages to
original condition. If there are huge empty extents before taking the
there will be huge empty extents after restoring the backup!

Art S. Kagel
----- Original Message -----
From: Giovanni Co.... <>
At: 1/27 11:29

*This message was transferred with a trial version of CommuniGate(tm) Pro*

The easiest way to do that is as follows:
1)Once you have deleted records from a table try to delete mor records
from other tables inthe dbspace.
2)Run informix db tools like tbcheck -ci (oncheck -ci), tbcheck -cr
(oncheck -cr), and so on, looking forward to have
healty tables before the backup.
3)Make a backup of the whole dbspace (you can use dbexport).
4)Re-initialize the dbspace; that will clear up the dbspace' structure.
5)Restore your back up.

This will assure you that the dbspace is fresh and clear and when you
restore the backup, it will came with the tables and structures (indexes,
etc) in order, 'cause the tools you ran over the tables in the dbspace,
before the backup.


Giovanni Cojulun

----- Original Message -----
To: <>
Sent: Monday, January 27, 2003 5:32 AM
Subject: How to Reclaim Space in the chunks [4]

> *This message was transferred with a trial version of CommuniGate(tm)
> Dear Colleagues,
> I have made about 40% of space available by deleting records from a
but the chunks still show as used up. How do I reclaim that space from the
> Regards,
> Athumani

Messages In This Thread

[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

IDS Forum is maintained by Administrator with WebBBS 5.12.