Zabbix not graphic full history/trends

[treydock]

I recently noticed that graphs went from having a max length of around 1 month to suddenly only 1 week and 5 days. My understanding was that by setting an item's Trends rention to 365 days that my graphs could potentially go out that far. However recently I refreshed a graph and it went from 1 month down to 1 week 5 days while still having zoom set to "All". I then checked and noticed all related graphs suddenly had no more than about 1 weeks worth of information displayed. Maybe I misunderstood the different between trends and history.

For all my items I want graphing data I set the history to 7 days and the trends to 365 days. This zabbix forum post makes it sound like if I choose "Zoom All" and it's greater than 24 hours then the trends data should be used.

What's even more strange is that a graph generated from item "Available Memory" (builtin check for Linux systems) has 1 month and 5 days worth of data, but a calculated item based from that check (Percent Available Memory), is only showing 1 week 5 days. I'm attaching the relavent configs.

I have not yet had any problems with Zabbix so am not well versed in how to go about troubleshooting this. I saw similar posts that got results by changing the Max Y / Min Y but that did not help in this case. Any advice is welcome.

EDIT: Screen shots show my altered config where I changed history to 30 days.

Thanks
- Trey

[Zaniwoop]

you might want to change the type to Numeric (float).
I suspect because you are doing division, it is wanting to return a float, but you have defined type decimal.

You will probably see this in the logs.

Hence the "no data". This also why you only have a limited period on your graph.

[treydock]

Wow thank you! Switched to Numeric (float) and suddenly my graphs are back to their full length of about 1.5 months.

Should all calculated items be assigned Numeric (float) ?

Thanks!
- Trey

[JBo]

Hi,

Should all calculated items be assigned Numeric (float) ?

It depends on the operation you do.
An integer is OK If you only add, subtract or multiply integers.

Regards,
JBo