Server Load Problem

[fr600]

I friend of mine sent me these codes and said it will show the server load.

$percent1 = min(100, round(exec('ps ax | grep -c apache') / 256 * 10 ));

$percent2 = min(100, round(exec('ps ax | grep -c apache') / 256 * 50));

But I don't know why, it always show 0%. I have no idea, is there anything wrong?

[mtmosier]

Hard to tell if there's anything wrong without knowing what was going through your friend's head when he wrote that.

ps ax | grep -c apache

"ps" gets a list of processes. "grep -c apache" searches that list for the word "apache", and the "-c" option (at least in linux) will make it return just a count of how many matching lines it found. What the number of apache processes has to do with server load is beyond me though, unless it's a very very rough estimate.

As for why it gives you 0, I'm not sure. It could be that "apache" is the wrong thing to grep for. Redhat 8 (the last redhat I used) called it httpd instead of apache, so this command would give you nothing. Or perhaps the number of processes is just too low on that machine. On my dev box I only have 5, which would come up as 0% for $percent1 (or 1% for $percent2).

[fr600]

Ohh I see, thanks for the help!