Ask Tom - "On Separation and Counting"
Our technologist promotes more than one schema, counts partitions, and uses TKPROF.
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Ask Tom: "On DBMS_ROWID, Parsing, and Sizing"
Our technologist identifies rows, analyzes ratios, and fills space.Read the article
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Ask Tom: "On Wrong and Right"
Our technologist checks the documentation and tests the answers.Read the article
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Ask Tom - "On Dynamic Sampling"
Our technologist samples dynamically, considers usage, and sets levels.Read the article
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Ask Tom: "Looking at Edition-Based Redefinition, Part 3"
Our technologist concludes his exploration of Edition-Based Redefinition.Read the article
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Ask Tom: "On Popularity and Natural Selection"
Our technologist optimizes away binds and promotes more-selective queries.Read the article
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"Ask Tom: On Seeing Double in V$SQL", Oracle Magazine, May/June 2008, Technology
Our technologist looks at SQL repetition in V$SQL and differences in cardinality.Read the article
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EM12c Release 4: Cloud Control to Major Tom...
- by abulloch
With the latest release of Enterprise Manager 12c, Release 4 (12.1.0.4) the EM development team has added new functionality to assist the EM Administrator to monitor the health of the EM infrastructure. Taking feedback delivered from customers directly and through customer advisory boards some nice enhancements have been made to the “Manage…Read the article
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Migrating a virtual domain controller for DR exercise
- by Dips
Hello gurus, I have a question. I have a requirement where I have a virtual domain controller and I have to migrate it to another virtual server in a different location. It is for test purposes to test out a DR scenario and the test will be deemed successful if the users that authenticate using the production DC can do so in the backup DC. I…Read the article
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how to run apache tom cat
- by FosterZ
hi,how to set path for apache tom cat of cataline_home pathRead the article
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Using Radio Button in GridView with Validation
- by Vincent Maverick Durano
A developer is asking how to select one radio button at a time if the radio button is inside the GridView. As you may know setting the group name attribute of radio button will not work if the radio button is located within a Data Representation control like GridView. This because the radio button inside the gridview bahaves…Read the article
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Oracle Database 11g upgrade egy érdekes hozadéka
- by Lajos Sárecz
A napokban olvastam egy érdekes 11g upgrade hatást Tom Kyte blogjában. Mivel mostanában sok hazai ügyfél tervez 11g upgrade-et, úgy gondoltam beszámolok én is errol, hátha valakinek hasznos lehet, bár szerintem viszonylag kevesen futnak majd bele ebbe a problémába. Az érdekes jelenséget az Oracle Database 11g Release 2 verzióban…Read the article
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filestream restore very slow to DR server
- by Jim
We are backing up a database containing 100GB of filestream data. The backup takes under two hours to write. Restoring the same database to the DR environment is taking over forty hours. We don't have the same problem with other (non-filestream) databases, including some that are much larger. How do we try and get to the bottom…Read the article
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WebLogic Scripting Tool Tip – relax the syntax with the easy button
- by james.bayer
I stumbled on to this feature in WLST tonight called easeSyntax. Apparently it’s a hidden feature that one of the WebLogic support engineers blogged about that allows you to simplify the commands in the interactive mode to have fewer parentheses and quotes. For example, see how some of the commands instead of typing…Read the article
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IT lead does not have a backup, DR plan in writing
- by Alex
This is a general management question to IT managers out there. We are a small firm with about 4 servers in our colo cabinent. No full time IT manager. But we do have one person on monthly contract and I am having a terrible time getting him to share what these plans actually are. I am sure he HAS a plan (and its probably in…Read the article
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Calculating estimated data loss with Always on
- by blakmk
Ever wondered how calculate estimated data loss (time) for always on. The metric in the always on dashboard shows the metric quite nicely but there does seem to be a lack of documentation about where the metrics ---come from. Heres a script that calculates the data loss ( lag ) so you can set up alerts based on your DR SLA's: …Read the article
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Graph representation in Dr Scheme
- by John Retallack
I want to represent a graph in Dr. Scheme in the following manner: For each node I want to store it's value and a list of adjacent nodes,the problem which i'm having difficulties with is that I want the adjacent nodes to be stored as references to other nodes. For example: I want node ny to be stored as („NY“ (l p)) where l…Read the article
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Issue getting camera emulation to work with Tom G's HttpCamera
- by user591524
I am trying to use the android emulator to preview video from webcam. I have used the tom gibara sample code, minus the webbroadcaster (i am instead using VLC streaming via http). So, I have modified the SDK's "CameraPreview" app to use the HttpCamera, but the stream never appears. Debugging through doesn't give me any…Read the article
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Inserting and Deleting Sub Rows in GridView
- by Vincent Maverick Durano
A user in the forums (http://forums.asp.net) is asking how to insert sub rows in GridView and also add delete functionality for the inserted sub rows. In this post I'm going to demonstrate how to this in ASP.NET WebForms. The basic idea to achieve this is we just need to insert row data in the DataSource…Read the article
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Pairing Sony bluetooth headphones with my PC, under Windows 7
- by jonathanconway
Hi there, I have the Sony DR-BT50 wireless headphones. I've been able to successfully pair them to my iPhone and play music through them, but no such luck with my PC. I can add it to the bluetooth devices, but when the "Driver Software Installation" screen comes up, I get a red X and "No driver found". Any…Read the article
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Pairing Sony bluetooth headphones with my laptop
- by jonathanconway
Hi there, I have the Sony DR-BT50 wireless headphones. I've been able to successfully pair them to my iPhone and play music through them, but no such luck with my PC. I can add it to the bluetooth devices, but when the "Driver Software Installation" screen comes up, I get a red X and "No driver found". Any…Read the article
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Tom Kyte szeminárium Budapesten, 2010. ápr. 19-20.
- by Fekete Zoltán
Még lehet jelentkezni Tom Kyte 2010-es budapesti szemináriumára, az itt található linkeken keresztül: - 2010. április 19-20., Budapesten tantermi szeminárium keretében. Témák: The top 10 - no 11 - new features of Oracle; Database 11g; All about binding; Materialized Views, Caching; Effective…Read the article
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SQL MIN in Sub query causes huge delay
- by Spencer
I have a SQL query that I'm trying to debug. It works fine for small sets of data, but in large sets of data, this particular part of it causes it to take 45-50 seconds instead of being sub second in speed. This subquery is one of the select items in a larger query. I'm basically trying to figure out…Read the article
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Do Eclipse's Refactoring Tools Violate The Java Language Specification?
- by Tom Tresansky
In Eclipse 3.5, say I have a package structure like this: tom.package1 tom.package1.packageA tom.package1.packageB if I right click on an the tom.package1 package and go to Refactor-Rename, an option "Rename subpackages" appears as a checkbox. If I select it, and then rename tom.package1 to…Read the article
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This Week In Geek History: Steve Jobs Demos the First Mac, Mythbusters Hits the Airwaves, and Dr. Strangelove Invades Popular Culture
- by Jason Fitzpatrick
It was quite a wild ride for this week in Geek History: Steve Jobs gave a demonstration of the first Macintosh computer, beloved geek show MythBusters took to the air, and iconic movie Dr. Strangelove appeared in theatres and our collective consciousness. Latest Features How-To Geek…Read the article
