On 21/12/2011 15:29, Erik Cederstrand wrote: > Den 21/12/2011 kl. 15.20 skrev Randy Schultz: > >> I agree whole-heartedly. I guess I wasn't clear. I wasn't trying to say >> most >> SA's never tune, only that from watching other SA's over the years, little >> tuning is done. > As a casual SA, I often find I'm fumbling around in the dark to find out if > my server is running optimally. I can check CPU and memory usage, but finding > out if I could get my server to perform better by fiddling with block sizes > or any number of sysctls is daunting. Who knows, maybe my batch jobs can > complete 50% faster, or my CPU load can go from 20% to 10%? > > I really like the mysqltuner script for MySQL in this regard because it > contains all the hard-earned experience of others and actually manages to > suggest useful values for the configuration file for me to adjust. It would > be great if there was something similar for FreeBSD that could suggest things > like "hey, you are getting interrupt storms on em0, might want to check up on > that" or "the block size on ada0 is insane for the current I/O load" or "on > this particular hardware, try setting sysctls xxx and yyy to NNN instead" or > "process 12345 is doing 1 billion system calls/sec, doesn't seem right". > Something like taking the suggestions from > http://serverfault.com/questions/64356/freebsd-performance-tuning-sysctls-loader-conf-kernel > and trying to guess from my specific setup which knobs might apply, and > possibly which values. > > I'm perfectly aware that this is not a substitution for actually thinking, > profiling and benchmarking, but at least I'll have a place to start. I agree that something like mysqltuner would be great, although its such a wide area to cover a single utility probably would not be practical. A good start would be updating the tuning(7) man page. Its been a while since I read it but the first paragraph regarding partition sizes is most definitely out of date. Time to reread it followed by groff_man(7) i guess ;)
Vince > Erik_______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org" _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org"
