How to only keep changes of values longer?

[Nux]

Hi. I have some stats for versions of components (like Tomcat version, Java version etc). So if I set this to update hourly then Zabbix will keep a lot all values that are just the same most of time. There seem to be no trend option.

So effectively rather then having something like this:

2019-09-10 12:00:03	Apache Tomcat/7.0.55
2019-09-10 11:00:03	Apache Tomcat/7.0.55
2019-09-10 10:00:03	Apache Tomcat/7.0.55
...

I would like to have something like this:

2019-08-10 11:00:03	Apache Tomcat/7.0.55
2019-07-16 10:00:03	Apache Tomcat/7.0.43
2018-01-10 09:00:03	Apache Tomcat/7.0.38
...

So in other words -- I would like to remove old, non-unique values and still have approximate time of change.

[Avinasha]

I would do that with a script/Userparameters I guess. If the current value is same as previous, don't send it. by doing that you will ideally be removing duplicate values. Another way is increase the frequency to once a week or so(Depending on your change frequency) and check last 500 values. (This isn't the best solution though)