What does F5 do - I've never pressed it?

What does F5 do - I've never pressed it?

It typically refreshes/reloads the page you're viewing in your web browser. There are other programs that also perform some sort of refresh when F5 is pressed, too.

F5 is the same as the insternet refresh on the top of the window

Nooo- it does nothing. Forget it

Pekka wrote in post #8660255
Nooo- it does nothing. Forget it

I heard nothing, I see nothing, I know nothing!

Jokes aside, that's a shock. I can certainly understand that if 25,000 people are concurrently doing intensive database searches it would strain the system, but page refreshes? That server must be operating right on the edge!

Lets see what it does...............

Oooh - the Nikon homepage

My keyboard went darker.

it creates an F5 Tornado :P

CannedHeat wrote in post #8660937
I heard nothing, I see nothing, I know nothing!

Jokes aside, that's a shock. I can certainly understand that if 25,000 people are concurrently doing intensive database searches it would strain the system, but page refreshes? That server must be operating right on the edge!

Every page load requires a database search to select the data for the current page. Some pages are a bigger hit than others and searching the text for keywords is a lot more work than just selecting posts where the forum id=x, but it's still a database hit.

More importantly, if your browser has sent one page request and the server is still trying to process it when you hit f5, the server will either have throw away what it had and start over or, even worse, it might keep trying to process the old request and start processing the new request too. Mutiply that by a few thousand frustrated users...

CannedHeat wrote in post #8660937
I heard nothing, I see nothing, I know nothing!

Jokes aside, that's a shock. I can certainly understand that if 25,000 people are concurrently doing intensive database searches it would strain the system, but page refreshes? That server must be operating right on the edge!

The way vBulletin is designed creates easily a "locking race condition" when launching a forum after reboot. vB has by design all the eggs in same basket. Each user creates a number of database updates and queries when loading a page, and the way MySQL works user can't get an egg out until other user has finished putting his egg there. So in the end no one gets nothing, hundreds might wait for dozen to finish. And a queue piles up. Each query is a process in server (tied by PHP to MySQL, and PHP is tied to httpd process), and even though I have very powerful server and clever server software this will cause an odd situation where almost nothing happes and server load is very high. In addition to above, which is almost never a long-term problem in POTN, we had disk corruption which made one disk read-only (it's a safety feature) so we got database errors caused by inability to write data.

That's a small portion of what I fought with today.

Pekka wrote in post #8661052
That's a small portion of what I fought with today.

A quite day at the office then!

lol

ukactionsports wrote in post #8661082
A quite day at the office then!

Since his office is here, probably a lot quieter than normal.

lol