web application performance

[Tayal Rohit]

interview questions,

1 .What will you do if ur web application is slow , what are the area u will check for to find out why ur web application is slow, and how will you resolve them.

and why http procol is called as state less.

2. What does an explain command do in sql how to use it.



thanks

rohit

[Ilja Preuss]

 

Originally posted by Tayal Rohit:
1 .What will you do if ur web application is slow , what are the area u will check for to find out why ur web application is slow, and how will you resolve them.

I'd use a profiler to find out. How I'd resolve it of course would depend on why it's slow...

and why http procol is called as state less.

Because the http server per se can't identify that two requests are coming from the same client - you need to use tricks like cookies or url rewriting to do that.

2. What does an explain command do in sql how to use it.

As far as I know, it gives you the execution plan for a statement, that can be used to analyze potential performance problems and optimizations (for example, what indices are used etc.)