Data available but graphs are empty

[maziggy]

I have the problem that all data are collected both on command-line and via cronjob. Anyhow only two graphs out of 10 are generated correctly. What makes me thoughtfully is that the last values can be displayed as text within the graph but nothing else.

For example :

/sys/tools/rrdtool/bin/rrdtool create \
/sys/httpd/htdocs/newyorkcity//privat/cacti/rra/memory.rrd \
--step 300 \
DS:total:GAUGE:600:0:1 \
DS:used:GAUGE:600:0:1 \
DSGAUGE:600:0:1 \
RRA:AVERAGE:0.5000:1:600 \
RRA:AVERAGE:0.5000:6:700 \
RRA:AVERAGE:0.5000:24:775 \
RRA:AVERAGE:0.5000:288:797 \
RRA:MAX:0.5000:1:600 \
RRA:MAX:0.5000:6:700 \
RRA:MAX:0.5000:24:775 \
RRA:MAX:0.5000:288:797 \


perl /sys/httpd/htdocs/newyorkcity//privat/cacti/scripts/memfree.pl 130904064:117006336:13897728

As mentioned the last values are displayed in a status bar within the graph but nothing else. Against this my CPU load graph with the same amount of adatasets and options works fine.

Can someone please bring some light into this ?


Thanks

[maziggy]

Just investigated some bit more. It seems like the data will not be written to the .rrd file. That's the reason why the graphs are empty.

But why it works for some graphs and for others not ?

[maziggy]

It doesn't let me sleep

If i update the database manually via rrdtool or rrdupdate on command line i got no error message but the data seems not to be in the database. Therefore it looks like a rrdtool problem.

[Guest]

Whew...found the problem. I think you'll be interested :

If i change the max value option within a data source and check the option "update .rrd file" the .rrd file will _NOT_ be updated.

Tooks a long time to find...