I have an application that uses NHibernate as its ORM and sometimes it experiences performance issues due to how the data is being accessed by it. What kind of things can be done to improve the performance of NHibernate? (Please limit to one recommendation per answer) ...
I have a need to do auditing all database activity regardless of whether it came from application or someone issuing some sql via other means. So the auditing must be done at the database level. The database in question is Oracle. I looked at doing it via Triggers and also via something called Fine Grained Auditing that Oracle provides. ...
My team is developing a new service oriented product with a web front-end. In discussions about what technologies we will use we have settled on running a JBoss application server, and Flex frontend (with possible desktop deployment using Adobe AIR), and web services to interface the client and server. We've reached an impasse when it ...
Is there any performance difference between tuples and lists when it comes to instantiation and retrieval of elements? ...
Any suggestions for tools to monitor page load times/errors and other performance metrics for a PHP application? I am aware of the FireBug and YSlow tools, but this is for more server monitoring. ...
I am looking for attributes I can use to ensure the best runtime performance for my .Net application by giving hints to the loader, JIT compiler or ngen. For example we have DebuggableAttribute which should be set to not debug and not disable optimization for optimal performance. [Debuggable(false, false)] Are there any others I shou...
For best performance, is it better to use a virtual IDE HDD or virtual SCSI HDD? If, SCSI, does it matter whether you use an BusLogic or LSILogic? ...
What environmental factors make you lose your motivation? ...
We need to optimize the text rendering for a C# Windows Forms application displaying a large number of small strings in an irregular grid. At any time there can be well over 5000 cells visible that update 4 times per second. The font family and size is consistent across the cells, though the color may vary from cell to cell, as will bo...
If I have the following: Public Class Product Public Id As Integer Public Name As String Public AvailableColours As List(Of Colour) Public AvailableSizes As List(Of Size) End Class and I want to get a list of products from the database and display them on a page along with their available sizes and colours, should I ...
Is there a performance hit if we use loop instead of recursion or vice versa in algorithms where both can serve the same purpose? Eg : Check if given string is palindrome. I have seen many programmers using recursion as a means to show off when a simple iteration algorithm can fit the bill. Does the compiler play a vital role in deciding...
I am using Tomcat as a server and Internet Explorer 6 as a browser. A web page in our app has about 75 images. We are using SSL. It seems to be very slow at loading all the content. How can I configure Tomcat so that IE caches the images? ...
Why does the use of temp tables with a SELECT statement improve the logical I/O count? Wouldn't it increase the amount of hits to a database instead of decreasing it. Is this because the 'problem' is broken down into sections? I'd like to know what's going on behind the scenes. ...
I understand the difference between String and StringBuilder (StringBuilder being mutable) but is there a large performance difference between the two? The program I’m working on has a lot of case driven string appends (500+). Is using StringBuilder a better choice? ...
When running any kind of server under load there are several resources that one would like to monitor to make sure that the server is healthy. This is specifically true when testing the system under load. Some examples for this would be CPU utilization, memory usage, and perhaps disk space. What other resource should I be monitoring, a...
Its not uncommon that I have a program whose performance relies heavily on just a few functions and I want to be able to measure a single loop or code segment's speed down to single-clock precision so that I know whether my changes are actually improving performance or whether I'm just falling for the placebo of "optimized" code. I pers...
Does anyone know how the speed of pylons(or any of the other frameworks) compares to a similar website made with php? I know that serving a python base webpage via cgi is slower than php because of its long start up every time. I enjoy using pylons and I would still use it if it was slower than php. But if pylons was faster than php, I...
I do work in theoretical chemistry on a high performance cluster, often involving molecular dynamics simulations. One of the problems my work addresses involves a static field of N-dimensional (typically N = 2-5) hyper-spheres, that a test particle may collide with. I'm looking to optimize (read: overhaul) the the data structure I use ...
In your experience, how often should Oracle database statistics be run? Our team of developers recently discovered that statistics hadn't been run our production box in over 2 1/2 months. That sounds like a long time to me, but I'm not a DBA. ...
I'm trying to find out what the performance of a large directory structure would be if deep directories were to be accessed on a shared, nfs filesystem. The structure would be excessively large, with 4 levels of nested directories, each level containing 1024 directories. (1024 at root, 1024 in a given subdirectory, and so on). This file...