Taking the work already done with vmplot.sh, a useful tool for MySQL performance tuning by Yves and Matt at BigDBAHead, and in true Open Source fashion I’ve enhanced and modified for my own purposes.

These changes include:

• Error checking for ‘gnuplot’ command on the system
• Eliminate the first row of sample data, as this is often not a complete sample for the vmstat duration.
• Created a HTML output file for easy browser viewing
• Changed Memory scale values from Kilobytes to Megabytes
• Resizing png’s for optimal 1024×768 display output (2 per row)

Download vmplot

And I get:

So more specifics of what I did.

Install gnuplot.

$ yum install gnuplot

Create vmstat sample file.

vmstat 1 100 > vmstat.out

Generate output graphs (need to work out those warnings)

 ./vmplot -i vmstat.out -o tmp
Warning: empty y range [0:0], adjusting to [-1:1]
Warning: empty y range [0:0], adjusting to [0:1]

And then I can view via a browser, in this case http://localhost/tmp/vmplot.htm

Some worthwhile references include Gnuplot Reference Manual, Gnuplot Examples and Gnuplot in Action

This entry was posted on Tuesday, March 31st, 2009 at 5:26 pm and is filed under Databases, Linux, MySQL, Open Source, Professional. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.