MySQL graphing woes

[Charles Jones <jonescr (at) cisco.com>]

I'm setting up mysql checks and graphing using the hobbit-modified 
bb-mysql.pl. I have the statuses working fine:


     Thu Apr 12 04:42:40 2007 MySQL Server OK

threads: 10
questions: 2751997
slow queries: 2100
opens: 304
flush tables: 3
open tables: 100
queries per second avg: 8.514
maxcon: 400

Server version: 4.1.9-standard-log
Uptime: 3 days 17 hours 47 min 3 sec

Server reports timestamp of 2007-04-12 04:42:40


However, instead of a graph at the bottom, I just have:
"hobbit graph ncv:mysql" next to the hourglass. I'm using Hobbit 4.20 
plus the latest "all in one" patch.

Here are the relevant sections from my config files, hopefully someone 
can point out what I'm doing wrong?
hobbitserver.cfg:
TEST2RRD="cpu=la,disk,inode,qtree,memory,$PINGCOLUMN=tcp,http=tcp,dns=tcp,dig=tcp,time=ntpstat,vmstat,iostat,netstat,temperature,apache,bind,sendmail,mailq,nmailq=mailq,socks,bea,iishealth,citrix,bbgen,bbtest,bbproxy,hobbitd,files,procs=processes,ports,clock,lines,mysql=ncv"
GRAPHS="la,disk,inode,qtree,files,processes,memory,users,vmstat,iostat,tcp.http,tcp,ncv,netstat,ifstat,mrtg::1,ports,temperature,ntpstat,apache,bind,sendmail,mailq,socks,bea,iishealth,citrix,bbgen,bbtest,bbproxy,hobbitd,clock,lines,mysql:mysqlslow,mysql:mysqlthread"
NCV_mysql="*:GAUGE"

hobbitgraph.cfg (these are the default entries that come with Hobbit):
[mysqlslow]
       DEF:slow=mysql.rrd:Slowqueries:AVERAGE
       TITLE MySQL Slow Queries
       YAXIS #
       LINE2:slow#00CCCC:Slow Queries
       COMMENT:\n
       GPRINT:slow:LAST: \: %5.1lf (cur)
       GPRINT:slow:MAX: \: %5.1lf (max)
       GPRINT:slow:MIN: \: %5.1lf (min)
       GPRINT:slow:AVERAGE: \: %5.1lf (avg)\n

[mysqlthread]
       DEF:threads=mysql.rrd:Threads:AVERAGE
       TITLE MySQL Active Threads
       YAXIS #
       AREA:threads#00CCCC:Threads
       COMMENT:\n
       GPRINT:threads:LAST: \: %5.1lf (cur)
       GPRINT:threads:MAX: \: %5.1lf (max)
       GPRINT:threads:MIN: \: %5.1lf (min)
       GPRINT:threads:AVERAGE: \: %5.1lf (avg)\n

Note I have also dumped out one of the rrd files, and they have data, so 
I don't think the problem lies with my NCV definition:
/$ rrdtool dump mysql.rrd |egrep 'name|value' | head -20/
               <name> threads </name>
               <value> 2.6730000000e+03 </value>
               <name> questions </name>
               <value> 8.1735172200e+08 </value>
               <name> slowqueries </name>
               <value> 6.2488800000e+05 </value>
               <name> opens </name>
               <value> 9.0288000000e+04 </value>
               <name> flushtables </name>
               <value> 8.9100000000e+02 </value>
               <name> opentables </name>
               <value> 2.9700000000e+04 </value>
               <name> queriespersecondavg </name>
               <value> 2.5239060000e+03 </value>
               <name> maxcon </name>
               <value> 1.1880000000e+05 </value>
               <name> Uptime </name>
               <value> 8.9100000000e+02 </value>
               <name> Serverreportstimest </name>
               <value> 1.5444000000e+04 </value>

So there we have it...the data is getting to Hobbit and being stored in 
the rrd files, it's just not displaying the graphs for some reason, and 
at the moment I can't see why. I searched the email archive and found 
lots of other posts of people having similar problems, with various 
solutions, none of which seem to work (yes I restart Hobbit after 
editing hobbitserver.cfg).