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There’s another interesting thread going on in Oracle-L, about understanding logical IOs and drilling down into their reasons. Of course sometimes (or rather usually) the excessive logical IOs come from a bad execution plan (when a nested loop loops over lots of datablocks again and again or a wrong index is used for driving a query etc), but sometimes the excessive LIOs are caused by some internal issues, like space management etc. A c....
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Explain Plan For command may show you the wrong execution plan – Part 1
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tanelpoder.com
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16 years ago
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eng
In Oracle-L mailing list a question was asked about under which conditions can the explain plan report a wrong execution plan (not the one which was actually used when a problem happened). I replied this with the following, but thought to show an example test case of this problem too: The optimizer statistics the EXPLAIN PLAN ends up using are different from the statistics the other session ended up using Explain plan does not..
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Explain Plan For command may show you the wrong execution plan – Part 1
-
tanelpoder.com
-
16 years ago
-
eng
In Oracle-L mailing list a question was asked about under which conditions can the explain plan report a wrong execution plan (not the one which was actually used when a problem happened). I replied this with the following, but thought to show an example test case of this problem too: The optimizer statistics the EXPLAIN PLAN ends up using are different from the statistics the other session ended up using Explain plan does not..
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This tutorial will provide you with a comprehensive understanding of the mixer interface for FL Studio. We describe every single knob/option on the interface.
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This article will explain the advanced topics of PHP classes, including polymorphism, abstract classes, and interfaces.
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An explanation of Automation Clips in FL Studio, how to create and modify them and assign them to different properties in FL Studio.
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i’m sure that most (if not all) of the technically inclined readers know about this already, but since it’s such a well written article (and detailed in the right places), i felt i should bump up it’s link count. http://en.wikipedia.org/wiki/Binary_prefix as an aside, i really liked Knuth’s suggestion; in the meantime let’s use the stupid kibi’s. You can hire James and his team at m9rx corporation . You can follow James..
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i’m sure that most (if not all) of the technically inclined readers know about this already, but since it’s such a well written article (and detailed in the right places), i felt i should bump up it’s link count. http://en.wikipedia.org/wiki/Binary_prefix as an aside, i really liked Knuth’s suggestion; in the meantime let’s use the stupid kibi’s. You can hire James and his team at m9rx corporation . You can follow James..
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This is an overview of the FL Studio application interface. This describes every window used in FL Studio.
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This month's release will start to show more of the Real-Time Strategy side of Stainless. One new feature that unfortunately will exclude a section of the target audience is speech recognition. I'm using the MS Speech API, which obviously only works on Windows. Sorry Linux and Mac users. :( Still, it's going to be worth it. Right now the level design and AI are not quite advanced enough to benefit from speech commands, but the potential i..
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Lately I’ve been thinking a lot about how easy it is to lose sight of the goal of the project and instead focus on whatever means someone first thought was a good starting point when the project was first conceived of. And I think it all comes down to words. The first years I was working in this business, I didn’t see any distinction between “the user” and “the customer”. Once I started seeing the distinction, I started to understand that t..
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This article will provide an introduction to CSS, which also requires an explanation of HTML (even if you know HTML you may want to read through it as it explains the relationship model). This article won't explain every single CSS attribute, but will explain everything you need to know to fully comprehend the language.
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AJAX is not a language. It is simply giving a name to something that has existed for years. Using the DOM of the web browser you are allowed to pass XML between the server and the client without having to reload the page. You don't necessarily have to pass XML; in this example we will be passing simple text.
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People don’t really understand, but we came within hours, we came within hours of a full nuclear exchange with the Russians,” said Paul Harris, who was in the…
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This is the first article in a serie about the Clesto CMS - my first PHP project (I am still a kind of noob, feedback appreciated). There is a huge difference in building something for yourself and something that you release for a lot of people to download. The Clesto CMS has now been tested [...]
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This is the first article in a serie about the Clesto CMS - my first PHP project (I am still a kind of noob, feedback appreciated). There is a huge difference in building something for yourself and something that you release for a lot of people to download. The Clesto CMS has now been tested [...]
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Before everyone gets too excited about golang, let’s not forget it lacks: Exceptions Assertions Inheritance Generic types Generics are necessary to express concepts like List
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Came across an interesting post today by author R. Scott Bakker, writing on Tor.com about his novel, “Neuropath.” He has some interesting things to say about the sometimes alien and unpalatable conclusions provided by science, an institution which he likens to a “cruel stranger”: So here’s the question: What other bitter pills does science hold in store for us? The cruel stranger isn’t finished, you can bet the family farm on that s....
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Came across an interesting post today by author R. Scott Bakker, writing on Tor.com about his novel, “Neuropath.” He has some interesting things to say about the sometimes alien and unpalatable conclusions provided by science, an institution which he likens to a “cruel stranger”: So here’s the question: What other bitter pills does science hold in store for us? The cruel stranger isn’t finished, you can bet the family farm on that s....
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Came across an interesting post today by author R. Scott Bakker, writing on Tor.com about his novel, “Neuropath.” He has some interesting things to say about the sometimes alien and unpalatable conclusions provided by science, an institution which he likens to a “cruel stranger”: So here’s the question: What other bitter pills does science hold in store for us? The cruel stranger isn’t finished, you can bet the family farm on that s....
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This article explains how to create attractive, high-quality graphs in Inkscape using spreadsheet data from either Calc (OpenOffice.org) or Excel (Microsoft). Introduction Communicating information is an art. For scientists, even the most amazing discoveries can be rendered worthless if we fail to communicate them effectively. Despite being one of the most important aspects of science, it’s often the most neglected. Perhaps the best means t..
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This is a step by step guide on how to make attractive buttons in Photoshop which look just like the Windows Vista buttons.
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At ØreDev I ran into Lasse Koskela. We started talking about estimation techniques, and we both felt that the dominant estimation technique of relative estimation with planning poker has been unchallenged for a very long time. We found ourselves wondering what the next big idea about estimation will be. After throwing a couple of ideas back and forth, we decided to invite to a workshop comparing a few estimation techniques. We decided to ca..
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This is a demonstration of the different image formats used for the web, with an explanation of which situation to use one or the other.
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lvs load balancing always felt like an elusive task. here i will document how to get it working with the excellent shorewall firewall, as an extension to their two interface common use case. this was all necessary for a group of grad students that needed to test out and develop some distributed algorithms. it turns out that once you get going, all this is quite easy and fun! the various components and files used for this setup includ..
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lvs load balancing always felt like an elusive task. here i will document how to get it working with the excellent shorewall firewall, as an extension to their two interface common use case. this was all necessary for a group of grad students that needed to test out and develop some distributed algorithms. it turns out that once you get going, all this is quite easy and fun! the various components and files used for this setup includ..
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I received a question about migrated rows recently. It was about how to detect migrated rows in a 200TB data warehouse, with huge tables – as the ANALYZE TABLE xyz LIST CHAINED ROWS INTO command can not be automatically parallelized at table level (as DBMS_STATS can be, but oh, DBMS_STATS doesn’t gather the migrated/chained row info). Therefore the analyze command would pretty much run forever before returning (and committing) the chained....
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I received a question about migrated rows recently. It was about how to detect migrated rows in a 200TB data warehouse, with huge tables – as the ANALYZE TABLE xyz LIST CHAINED ROWS INTO command can not be automatically parallelized at table level (as DBMS_STATS can be, but oh, DBMS_STATS doesn’t gather the migrated/chained row info). Therefore the analyze command would pretty much run forever before returning (and committing) the chained....
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Here we will describe several of the popular blending options used in photoshop, with screenshots and explanations of each setting.
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Just three weeks ago, I was asked to step in for Ted Neward to give a tutorial at Øredev on Effective Enterprise Java. As I did not have time to get the tutorial materials printed, I present them here on the web for the participants and others. 1. Effect Enterprise Java architecture in 2009 Since the Effective Enterprise Java book was written, many of the topics regarding transactions, concurrency and shared state have been resolved.
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while doing a little reading and research, i ended up reading a bit of the hdparm man page. never in my life have i read such a scary man page. i guess it is appropriate for halloween, but it came 2 days late in my case. as a result of my being so impressed with the sheer amount of warnings in the manual, i have decided to compile them here.
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while doing a little reading and research, i ended up reading a bit of the hdparm man page. never in my life have i read such a scary man page. i guess it is appropriate for halloween, but it came 2 days late in my case. as a result of my being so impressed with the sheer amount of warnings in the manual, i have decided to compile them here.
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Local artists and photographers entered more than 100 photographs into the Auburn Arts Association’s Photo XI photo exhibition at the Jan Dempsey Community Arts…
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About 314 million people worldwide are visually impaired, and almost 45 million of those are blind, according to the World Health Organization Web site.
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I had my laser eye surgery today. Instead of writing about how awesome (or not awesome) it was, I’ll first tell you how exactly it happened.
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After much ado, Donat Studios is finally live! There are a few things left to complete. Eventually setting up the documentation and public git repository for CorpusPHP will certainly take up a fair amount of time. I'm still not quite sure what to put in my portfolio, I was thinking of for the time being just throwing a bunch of my sketches in there. My reasoning and goals behind this site are slightly different than my other sites. More....
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After much ado, Donat Studios is finally live! There are a few things left to complete. Eventually setting up the documentation and public git repository for CorpusPHP will certainly take up a fair amount of time. I'm still not quite sure what to put in my portfolio, I was thinking of for the time being just throwing a bunch of my sketches in there. My reasoning and goals behind this site are slightly different than my other sites. More....
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Sometimes when an attendee describes me some totally weird problem during a seminar, I am immediately able to answer something like “Hey this looks like a bug related to this Oracle configuration and can be influenced by xyz”. And then people ask me “How the hell do you know all this stuff?” Well, I haven’t been bitten by all of these bugs myself, but I have been doing something for many years, almost every day… reading my email! Oh, ..
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Sometimes when an attendee describes me some totally weird problem during a seminar, I am immediately able to answer something like “Hey this looks like a bug related to this Oracle configuration and can be influenced by xyz”. And then people ask me “How the hell do you know all this stuff?” Well, I haven’t been bitten by all of these bugs myself, but I have been doing something for many years, almost every day… reading my email! Oh, ..
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