I'm using the server.kbytes-per-second directive to limit the output from my server, and have found that it suffers severe malfunctioning; setting the variable to 215 results in an avg. output speed of 135kb/s, with occassional bursts up to 175kb/s. Setting the variable to 150 results in an avg. output of 100kb/s, with bursts up to 200kb/s and so on. No value manages to actually limit the output correctly, the result is always erroneous and seems not to follow any pattern.
When this directive is in effect, lighttpd also fails to maintain a smooth and constant transfer speed. Instead the speed staggers back and forth, f.e. starting at 135kb/s then slowly rising to 175kb/s, then the transfer halts entirely, and a short while later it resumes again at 135kb/s and begins anew to climb up, repeat.
I'm running OpenBSD 4.1, but I've also tried this on a Slackware box and it manifested itself there as well. I have yet to try out v1.4.15.
