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• Clustered index on frequently changing reference table of one or more foreign keys

  - by Ian

  My specific concern is related to the performance of a clustered index on a reference table that has many rapid inserts and deletes. Table 1 "Collection" collection_pk int (among other fields) Table 2 "Item" item_pk int (among other fields) Reference Table "Collection_Items" collection_pk int, item_pk int (combined primary key) Because the…

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• Send 404 when requesting index.php through .htaccess?

  - by Daniel

  I've recently refactored an existing CodeIgniter application to use url segments instead of query strings, and I'm using a rewriterule in htaccess to rewrite stuff to index.php: RewriteRule ^(.*)$ /index.php/$1 [L] My problem right now is that a lot of this website's pages are indexed by google with a link to index.php. Since I made the…

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• Using `.index()` on repeating letters

  - by Yarden

  I'm building a function that builds a dictionary with words, such as: {'b': ['b', 'bi', 'bir', 'birt', 'birth', 'birthd', 'birthda', 'birthday'], 'bi': ['bi', 'bir', 'birt', 'birth', 'birthd', 'birthda', 'birthday'], 'birt': ['birt', 'birth', 'birthd', 'birthda', 'birthday'], 'birthda': ['birthda', 'birthday'], 'birthday': ['birthday'],…

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• Using TweenMax to fade in div with background pattern and z-index not working

  - by shibbydoo

  I'm trying to do this really simple fade using TweenMax for this div I have. Here's the css for the div .aboutBg { background:url(../images/pattern.jpg); top:0; right:0; left:0; bottom:0, position:fixed; border:10px solid red; z-index:10; } TweenMax.to('.aboutPage', 0.5, {autoAlpha:1}); What's happening…

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• Java: How ArrayList memory management

  - by cka3o4nik

  In my Data Structures class we have studies the Java ArrayList class, and how it grows the underlying array when a user adds more elements. That is understood. However, I cannot figure out how exactly this class frees up memory when lots of elements are removed from the list. Looking at the source, there are three methods that remove…

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• Getting a query to index seek (rather than scan)

  - by PaulB

  Running the following query (SQL Server 2000) the execution plan shows that it used an index seek and Profiler shows it's doing 71 reads with a duration of 0. select top 1 id from table where name = '0010000546163' order by id desc Contrast that with the following with uses an index scan with 8500 reads and a duration of about a…

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• Links from Google appending index.php to my URL

  - by davykiash

  I recently put up a site and I have been doing some SEO. However I noticed that links from Google search append index.php to my links. For example a site page which clearly appears as www.example.com/index/why on search together with correct content sample when clicked on ends up in the new browser as www.example.com/index.php/why…

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• Database is very slow when creating an index

  - by kaliyaperumal M

  My database has around 25 core numbers, in that weekly basis I need to create an index and drop index. While creating the index it takes long time to complete, my log file also keeps on increasing, and when I delete some numbers from that table also taking too much time (because weekly basis I have to delete 30 to 50 lack numbers…

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• Why is my index view not working when I implement datepicker in my rails app

  - by user3736107

  Hi I am new to rails and would really appreciate some help, I am using the jQuery datepicker, the show view works however the index view doesn't, i get "undefined method `start_date' for nil:NilClass" in my index.html.erb file. Can you please let me know what is wrong with my index view and how i can fix it. The following are…

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• Clustered Index

  - by Charu

  Which type of index(clustered/non clustrered) should be used for Insert/Update/Delete statement in SQL Server. I know it creates an additional overhead but is it better in performance as comparison to non clustered index? Also which index should be use for Select statements in SQL Server?

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• sort list(of string()) using a variable index into string() as key - vb.net

  - by tullynyguy

  I have a List(of String()). I have written a custom comparer (implements IComparer(of string)) to do an alphanumeric sort. Is there a way to sort the List using a given index to determine which position in the String() to sort by? In other words one time I might sort by Index = 0 and another time by Index = 3. The length of all…

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• Python finding index in a array

  - by NIH

  I am trying to see if a company from a list of companies is in a line in a file. If it is I utilize the index of that company to increment a variable in another array. The following is my python code. I keep getting the following error: AttributeError: 'set' object has no attribute 'index'. I cannot figure out what is going…

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• SQL SERVER – Plan Recompilation and Reduce Recompilation – Performance Tuning

  - by pinaldave

  Recompilation process is same as compilation and degrades server performance. In SQL Server 2000 and earlier versions, this was a serious issue but in SQL server 2005, the severity of this issue has been significantly reduced by introducing a new feature called Statement-level recompilation. When SQL Server 2005 recompiles…

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• SQL SERVER – Performance Comparison – INSERT TOP (N) INTO Table – Using Top with INSERT

  - by pinaldave

  Recently I wrote about SQL SERVER – INSERT TOP (N) INTO Table – Using Top with INSERT I mentioned about how TOP works with INSERT. I have mentioned that I will write about the performance in next article. Here is the performance comparison of the two options. It is clear that performance of the Insert TOP (N) [...]

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• SQL SERVER – Data and Page Compressions – Data Storage and IO Improvement

  - by pinaldave

  The performance of SQL Server is primarily decided by the disk I/O efficiency. Improving I/O definitely improves the performance. SQL Server 2008 introduced Data and Backup compression features to improve the disk I/O. Here, I will explain Data compression. Data compression implies the reduction in the disk space reserved…

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• SQL SERVER – Checklist for Analyzing Slow-Running Queries

  - by pinaldave

  I am recently working on upgrading my class Microsoft SQL Server 2005/2008 Query Optimization and & Performance Tuning with additional details and more interesting examples. While working on slide deck I realized that I need to have one solid slide which talks about checklist for analyzing slow running queries. A…

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• What is the usage of Splay Trees in the real world?

  - by Meena

  I decided to learn about balanced search trees, so I picked 2-3-4 and splay trees. What are the examples of splay trees usage in the real world? In this Cornell: http://www.cs.cornell.edu/courses/cs3110/2009fa/recitations/rec-splay.html I read that splay trees are 'A good example is a network router'. But from rest…

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• SQLAuthority News – Excellent Event – TechEd Sri Lanka – Feb 8, 2010

  - by pinaldave

  TechEd Sri Lanka was held at Waters Edge, Colombo between Feb 8 and Feb 10, 2010. It was one of the largest successful technical event in Sri Lanka. I was extremely surprised to how technically sound this event was and how excited the TechEd attendees were. I presented there on two different subject. They were very…

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• Remove urls to unidex blog content from google, then copy blogs content to new blog [closed]

  - by sam

  Possible Duplicate: migrating PR / rankings from one site to another Ive been writing a blog for the past yr or so, with about 300 published articles, the blog have been running under a subdomain blog.mysite.com We are no looking to change the url of our site, so the blog is going to have to be ported over…

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• Why Google skips page title

  - by Bob

  I have no idea why this is happening. An example http://www.londonofficespace.com/ofdj17062004934429t.htm Title tag is: Unfurnished Office Space Wimbledon – Serviced Office on Lombard Road SW19 But is indexed as: Lombard Road – SW19 - London Office Space If you look in the source code and search for this…

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• Google indexing wrong domain that does not work

  - by user174117

  Can anyone tell me why Google indexes a site http://0.3c.7aae.static.theplanet.com instead of the actual domain name (my domain was registered with webmaster tools). The aforementioned link was linking to my site, but has now become a broken link. Initially I tried 301 directs, but nothing worked. The…

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• Weird 301 redirection by google crawler

  - by Ace

  I have some pages on my website www.acethem.com which are having 301 redirection but they are not actually 301 redirects. e.g. www.acethem.com/pastpapers/by-year/2007/ is seen as a 301 redirection to www.acethem.com/pastpapers/by-year by google (I am using "Fetch as google" in webmaster tools. Now more…

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• How can I prevent HTTPS on another domain from wrongly showing on my HTTP-only domain?

  - by Earlz

  So, I have a blog at domain.com. This blog is HTTP-only because I would gain almost nothing from adding SSL support. I have a web service now that I want to enable SSL support on that runs on the same server and IP address as my blog. I got it all working pretty easily, but not if I go to…

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• Meta description of my blog post changes

  - by Aadarsh sojitra

  I have some problems in Meta description tags in my Blogger blog. When I update my pages in search engine with the help of the Fetch as Google feature in GWT, all my blog's results comes with a correct meta description like Today I am back with a reason that "WHY IS ORIGINAL MEMORY IN…

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• Unindexing my tumblr blogs content and moving it to another tumblr blog

  - by sam

  ive been writing a tumblr blog for the past yr or so, ive writen about 300 articles, but now i need to move the blog to another site. (before it was running under blog.mysite.com and i now want it to run under blog.my*new*site.com) I want to keep the archived articles and have them on…

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