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

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IDS Forum

Re: Please vote for a new Informix RFE:

Posted By: Fernando Nunes
Date: Friday, 29 July 2016, at 5:25 a.m.

In Response To: Please vote for a new Informix RFE: (Art Kagel)


I understand the rational behind this request, but I don't think that is
the best way to solve it.
First, we need to distinguish between the logical log buffers (3) and the
hdr logical log buffers (12).
There are situations where we could use "more" of them. For standard
servers the HDR buffers are not an issue. If you see "G" flags in onstat -u
you'll know that we're not flushing the buffers quick enough and it may be
the reason behind this request. On HDR clusters there were situations where
due to network constraints or lack of resources on the secondary the 12
buffers are not enough (in the past there was even a patch provided for a
specific customer if I recall correctly).
Increasing or auto-configuring the HDR buffers would be a good idea.

However, for the "normal" log buffers (3 of them) increasing them is like
hiding the real problem. The problem with log buffers is that we don't
really use them in real/heavy OLTP systems. As I explained in a recent
thread due to the fact that most customers use non-buffered logging we're
constantly flushing the buffers because we do it on every session COMMIT.

What should be done and is already implemented in other RDBMS like DB2 and
Oracle (SQL server seems to lag behind as they recently introduced what we
have) is what is called "GROUP COMMIT".
Basically we don't flush immediately (to allow the buffer to fill up a
little more at least) but we only return on the COMMIT once the info is
actually flushed to disk.
If done properly the applications will not notice any significant delay,
and instead of doing constant flushes that include around one page of
logical log buffer we do less flushes and that allows for the normal
rotation of the three buffers.

Last time I don't think I posted this, so, from a real customer:

IBM Informix Dynamic Server Version 11.50.FC7XH -- On-Line (Prim) -- Up
365 days 13:22:06 -- 18026336 Kbytes

Physical Logging
Buffer bufused bufsize numpages numwrits pages/io
P-1 82 128 10621588 85983 123.53

phybegin physize phypos phyused %used

2:53 1975000 1939119 7499 0.38

Logical Logging
Buffer bufused bufsize numrecs numpages numwrits recs/pages
L-1 0 128 175401685 11939562 6501187 14.7 1.8

Subsystem numrecs Log Space used

OLDRSAM 175401555 16032723948

HA 130 5720

As you can see we have 256KB of logical log buffer. But on average we write
to disk only 1.8 pages.
This is caused by the fact they use unbuffered logging (like virtually all
the customers) and because they have a relatively large number of sessions
(should vary between 1000 and 3000). So the rate of COMMITS is very high.

Of course we coudl increase the number of log buffers... but that's not how
this problem was solved in other technologies and there are probably good
reasons for that.

Finally, there is also an RFE to implement GROUP COMMITS:

Feel free to vote ;)

On Thu, Jul 28, 2016 at 7:31 PM, Art Kagel <> wrote:

> Folks:
> I have entered a new RFE # 92334. It requests that IBM make the number of
> logical log buffers configurable, dynamically adjustable, and include an
> AUTO_ autonomic tuning capability for this resource:
> Please vote for this if you think it might be useful to you.
> Art
> Art S. Kagel, President and Principal Consultant
> ASK Database Management
> Blog:
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and do not reflect on the IIUG, nor any other organization with which I am
> associated either explicitly, implicitly, or by inference. Neither do
> those opinions reflect those of other individuals affiliated with any
> entity with which I am affiliated nor those of the entities themselves.
> --001a1143f0a6380c9c0538b65911
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.

Fernando Nunes
My email works... but I don't check it frequently...


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