Scott Haneda wrote:
> Unless I am totally off base here, the mysql docs tell very little in
> regards to how to performance tune mysql.
>
> So far I have found this article to help:
> <http://www.databasejournal.com/features/mysql/article.php/10897_1402311_3>
> But it still leaves me with a ton of questions.
>
> For starters, and don't laugh, I just installed mysql and let it run,
> started adding sites to it and such. The machine has 1 gig of ram in in,
> but at times, I could ask it were a little snappier. It is a 1.2Ghz
> machine.
>
> First thing I did last night was to try to get a hnalde on this. From what
> I can tell, I have no my.cnf file in place, so there must be some default
> settings that are compiled in. I set up a cron job to run the following:
>
> show variables like 'table_cache'
> show status like 'open%_tables'
>
> I have been running this once a minute for a day now, how long should I run
> it to get an idea of what I need to change to better suit my servers load
> usage?
>
> First entry after a mysql restart:
> Wed Sep 7 03:18:00 PDT 2005
> table_cache 64
> Open_tables 64 Opened_tables 1050
> -----------
>
> Last entry as of now:
> -----------
> Wed Sep 7 16:27:01 PDT 2005
> table_cache 64
> Open_tables 64 Opened_tables 4407
>
> So it looks like Opened_tables is going to increase forever at the rate I
> have it, which I am guessing is not a good thing, but not sure what I need
> to do to fix this.
>
> I am really looking for some pretty detailed docs on exactly what I can do
> in my.cnf to make this work out better.
>
> Thanks again, and if there are any questions that would help me get a better
> answer, please let me know.
Try to find a book called High Performance MySQL from Derek J. Balling &
Jeremy Zawodny (the guy from Yahoo). It's an interesting and useful book
which skips all the basic stuff and gets you into performance tuning.
ISBN : 0-596-00306-4
