Thank you, haven’t had “chart pages” on my radar yet. Indeed, it works well with singular items. However, if I wanted a chart page with two items, one using influxdb as a storage back-end and the other using rrd4j, it would still be a problem.
Also, I found out that my initial histogram was using the analyzer. The analyzer is linked on every “item” configuration page. And also someone else had my problem before, without a solution present.
So whether be it chart pages or the analyzer, i think there should be a metadata namespace or something to tell openhab which storage engine should be used for retrieval of data. The actual persistence is configured through the .persists files, which is fine, but I am looking for an option for the other way around.
Of course I could use influxdb for everything, however being able to use different persistence services simultaneously has it’s charm, especially something like inmemory.