This may have been the result of an upgrade to from 4.1.6 to 4.2.1, not sure. This search used to generate a great scatter plot:
sourcetype="clariion_lun" tag=XXX | bucket span=10m _time | stats sum(Total_Throughput_IO_per_sec) as IOPS by Raid_Group, _time |sort -IOPS
It used to have the Raid_Group # on the x axis, IOPS on the y. When you moused over the data points on the graph, you'd get the number of IOPS and the time of then event. The graph looks like it's set up, but there are no points on it.
turns out I just needed to swap the order of the measures in the by
statement:
sourcetype="clariion_lun" tag=XXX | bucket span=10m _time | stats sum(Total_Throughput_IO_per_sec) as IOPS by _time,Raid_Group |sort -IOP
Can you paste in the XML from the dashboard in question? I'm curious to see the charting.chart.* keys as well.