The following describes the settings for Configuration > System > Performance Graph Settings in detail. These settings affect.

Appearance of the performance graphs in the User Web Interface, like size, color and type of plot
Creation of RRD files and lifetime of the stored values
Contents of graph like plotting a MAX or LAST value

Performance Data Collection - RRD

The azeti SONARPLEX uses the awesome RRDTool from Tobias Oetiker. An extended documentation can be found here.

Performance data is collected and stored in Round Robin Database files, so called RRDs. The files have a fixed size and thus a fixed number of data slots. Older data is then averaged over time to provide this fixed container size. This does not mean that measurements are lost, it rather means that measurement of the farer past are saved in a lower resolution as measurements from the last week.

Therefore data is saved in two containers (RRAs, Round Robin Archives):

high resolution RRA
low resolution RRA

Each container holds data of a fixed amount of time but with different resolutions.

On this page:

Export

Performance data can be exported with the Data-Exporter Addon.

Graph Types

Three different graph types are available. The LINE types should be used for measurements with drops and peaks where area is the better choice measures such as disk usages.

You can configure the type either globally here or you can override the global value on a service base with the service setting Performance data type

Thin Line - LINE1

Thick Line - LINE2

Filled Area - AREA

Settings

The following table explains all settings in detail.

Setting	Description
Graph type:	Global graph type which is used if nothing different was specified. LINE1 LINE2 AREA
High resolution data interval (minutes):	The lowest interval for stored data that is used for the AVERAGE during plotting. This should be as low as the lowest Normal Check Interval of any configured service to provide high accuracy. If this resolution interval is chosen larger than the Normal Service Check Interval the values will be averaged.
High resolution data pool size (days):	Time in days specifying how long values are stored in the low resolution data archive RRA (Round Robin Archive).
Low resolution data interval (minutes):	The lowest interval in minutes for the low resolution container. Specifies over how many minutes the collected data should be averaged and stored.
Resolution for MAX values (items):	The MAX resolution decides about how many values are taken to evaluate the maximum. The default is 3 so the maximum value out of 3 measured values is plotted (if it is enabled by [Plot MAX value]).
Low resolution data pool size (years):	Specified the number of years for storage of low resolution data.
Graph width (px):	Width of graphs in pixels Raise the width to get wider graphs and to subjectively enlarge the detail.
Graph height (px):	Height of graphs in pixels
Color for MAX of first value:	Color for plotting the MAX values, use a bright color to visualize peaks.
Color for MAX of second value:	Color for the MAX value of the possible second measurement
Color for first value:	Color for the first value
Color for second value:	Color for the second value Plotting of two values is currently only supported for check_icmp based services.
Color for LAST value:	Color for the horizontal line plotted for the LAST value of every graph.
Color for WARNING:	Color for horizontal WARNING threshold line
Color for CRITICAL:	Color for horizontal CRITICAL threshold line
Plot MAX value:	Enables or disables the plotting for the MAX value. Plotting the MAX value can sometimes lead to confusion, especially when plotting time critical measurements such as ICMP round trip times whee such MAX could be misread as jitter.
Plot LAST value:	Enables or disables the plotting of the LAST value, helps you compare the last measurement against the average of the past
Debug Level:	Debug Level, should only be changed when necessary for troubleshooting
Warning threshold for RRD disk usage (Gb):	Threshold when the built-in service check RRD-Disk-Usage on the host -azeti-A- should turn into WARNING
Critical threshold for RRD disk usage (Gb):	Threshold when the built-in service check RRD-Disk-Usage on the host -azeti-A- should turn into CRITICAL