Hi, I had a chance to look at Graphite deployment today at one of the customers and it truly rocks. I am happy to finally find graphing solution which makes a differences between sources and graphs and makes it easy to dynamically create graphs as you need to analyze data unlike Cacti Ganglia etc. It is also phenomenal in its simplicity to get the data in.
The use case I am working with it is performance analyzes, mainly around MySQL. Here are some questions I got during the last couple of days using it which I have not found a good answer in the manual 1) Is it possible to see Ratio between 2 values. For example I want to divide transaction rate per number of reads to graph of IOPs per transaction ? 2) Is it possible to enable Graphiti to show exact value when I mouse over the line on the graph ? In some cases you can't see exactly if value is same or just close and it can be important for some data points. 3) Is it possible to prevent graph from using something other than 0 as the lower bound (other than plotting the "zero" datapoint) - for certain data types it can produce confusing graphs showing variance which is a lot larger than it really is. 4) Is it possible to get the graph with log scaling ? This is helpful if you want to get graphs which have values which can be at different scales sometimes. For example number of rows read and written may be close for some workloads but for others rows reads may be in millions which makes the number of rows read going between 100 and 200 looking as the same value. Log scaled graphs allow to see details better in such case. 5) Is it possible to use expression in scale function ? I have per minute resolution but I'm looking to get per second data on the graph which Means I have to scale by 1/60 Right now I have to enter 0.016666666 instead which looks confusing compared to having expression 6) Is there any way to select the table to be displayed alongside the graph. With Cacti/Ganglia we often plot the table which would show min/max/avg/cur data for the data set for reported period which can be handy 7) Is there way I can zoom from the graph ? For example I'm looking at weekly view I have some period where I see something unusual which I'd like to zoom to. Some tools allow to do that with mouse which is very convenient. Recording the data and picking it in calendar is less so. Thanks :) Graphite is truly outstanding graphing solution.
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