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2055 - Effect on server when memory runs out and swapping starts
Here's an interesting example from a web server showing what happens when real memory runs out and the system starts swapping ... it can be something of a downwards spiral in terms of performance, as the majority of the resources are essentially tied up by the swapping / keeping going at all once me ....

2054 - Tuning httpd / the supermarket checkout comparison
Why do you have multiple copies of "httpd" running on your web server, even though you have only got one process in startup? It's because httpd spawns child processes which allow it to be handling several customers at the same time rather than have them stand in line and be processed sequentially. ....

2053 - What a difference a MySQL Index made
If you add an index to a column in a MySQL table, you provide a very quick way of looking up a row or set of rows based on the value in a certain column, but at the expense of additional disc space and a bit more internal management. Here's an example in which I look up a record (by URL) in a table ....

2052 - How was my web site compromised?
It looks to me as if this car has left the road and come to a sudden halt against the building, with the result that both have been somewhat damaged. But why did it happen? Was there a mechanical failure such as brakes or tyres? Did the driver fall asleep at the wheel or something distract him ....

2051 - A Presentation about our company - web and PHP
In answer to a request for further information about our training centre, the town in which it's located, and our training methods and facilities, I've put together a "Slide show" style page. The images on the left, a few of which may look familiar from our image map demo of the ....

2050 - Why the Pony Tail?
I'm not sure if "why do you have a ponytail" is a question about a course or about a subject we teach ... actually it's rather personal... but it's a good question and I have chosen to answer in this case. Here are three possible answers for the beard - and - ponytail question. Which do you think i ....

2049 - Why Choose Well House Consultants for your course?
The course must cover the right subject. From the right starting point. And at the right pace. It must be taught be someone who knows the subject, can present it in such a way that you can take in what you're being taught, and who can (and will) advise you on what is the best way for you to apply w ....

2048 - Learning to program in PHP, Python, Java or Lua ...
... or in Ruby, Tcl, C, C++ or Perl Are you new to computer programming? Is it so long since you programmed that you feel very rusty and would like to start again from basics? If you've said "yes" to either of these questions our new "Learning to program in ...." series of courses may be exactly wh ....

2047 - Small Web Server in Perl
I would not encourage you to write your own web server in Perl, but I might suggest that you used the http protocol as a convenient intersystem communication protocol ... and that might result in you implementing part of http for the purpose ;-) With that proviso in mind, I have just added source c ....

2046 - Finding variations on a surname
Here's a little demonstration of how you can use PHP to look for a 'similar word' - in this case, from a file of surnames. Have I done all the hard work? No - I crawled for some surnames to add to my demonstration file, and I used PHP's built in functions to do the hard work! Run Demonstration ....

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