graph parameters by hand

[limo]

In huge systems, there are many items to monitor. It is hard to find monitored parameter to add to graph and it is sometimes slow. Next problem is that sometimes wee need to compute graph items by formula. Maybe it would be better if there is no selectbox but inputbox. I can write any expression to graph.

eg.
{server:netloadin[eth0].avg(120)/server:netloadin[eth1].avg(120)}
would monitor firewall with twoo interfaces eth0 and eth1 . If number is close to 1, everything is ok, another value could be some attack and would be nice to see it in graph.

or

{server:diskfree[/].change(0)} can be used to see changes in disk space.

[mlevin]

Brilliant idea! I vote for it!

Brilliant idea! I vote for it!

[Alexei]

How would you imagine graphing of the {server:netloadin[eth0].avg(120)/server:netloadin[eth1].avg(120)}? The metrics will have different timestamps for eth0 and eth1, thus making calculations very difficult (slow).

Please, give me a hint.

[limo]

Some math functions could help ?

Maybe there could help some regression or interpolating math functions ? I know this will not help too much, but sometimes it is not needed to be exact in graphs. MAybe my example was not clear, I cannot compare too much diferent values. But it is enaught for me if I can make ath functions with same values. Maybe that math regressing function could be implemented in graphs globally. (it should be parameter of graph, because not all time we need this). But when we measure e.g. temperatue in long intervals, it is enaught to make regression between points. Sometime regression is good and sometimes interpolation. I can find/write some class doing this work.

Next, I found nice javascript which could be used to simlify this editing. It will autocomplete words entered in inputbox. I can make some changes to use it with zabbix and send it to you.

[Wolfgang]

In huge systems, there are many items to monitor. It is hard to find monitored parameter to add to graph and it is sometimes slow.
...

I second that. My suggestion is to add a combobox to the form, that allows to specifiy a host to narrow down the items offered to be graphed.