For the feature request itself, maybe this limit can be made configurable?

Just to add, I am running heavy Zabbix instance with limit extended, having several thousands of dependent items (around 4K+ for around six master items, totaling to 25K+ dependent items over the limit, and tens of thousands of other dependent items along). No issues encountered from extending the limit.

Hi! I'm using Zabbix to receive values from prometheus node-exporter. We have really huge environment, and for one prometheus metric there can be more than 3k+ values. Please, increase the number of depended items.

From documentation:

*Limitations*
Only same host (template) dependencies are allowed
An item prototype can depend on another item prototype or regular item from the same host
Maximum count of dependent items for one master item is limited to 999
Maximum 3 dependency levels allowed
Dependent item on a host with master item from template will not be exported to XML

Is not clear if the limit of 999 dependent items is a total number of all 3 dependency levels allowed per Master or not?

At the moment with 4.2.6, if spawn a Master Item in other 6 dependent items and use them as master for 6 LLDs i received an Error Message that say "maximum dependent reached"....

Available in 4.4.0beta1 (master) 8d47a344

The code merge is related to extend the limit to "9999" dependant items? If yes i think is not enough for PromQL metrics use cases.

Yes, dimitri.bellini  maximum count of dependent items for one master item will be limited to 9999 (regardless of the number of dependency levels)
 

@Aleksandrs Is not possible to have the limit number as a Zabbix_server parameter in the conf file?

Actually, can't it be made configurable? Some people will surely hit the 9999 limit as well

Alex/AT We have raised the limit to 29999 dependent items.
Yes, we discussed the option to make it configurable parameter.
However, this could be risky, because this may unintentionally break Zabbix installation, or at least make it unstable in case of automatic item creation (it may hit the upper limit no matter how big it is).

this could be risky ... it may hit the upper limit no matter how big it is

atumilovics, you can say the same about Linux kernel limits, but nevertheless, they are configurable.

Well, configurable limit cannot break Zabbix installations per se if it defaults to 999. It would actually be even safer, because only the ones who need it will change it from the 'old' default, heeding the appropriate warnings.

Updated documentation:

• Dependent items
• What's new

I had a case when 29999 was not enough. I could not update LLD rule on "Template Module Linux block devices by Zabbix agent" template.
Had to temporary manually increase the limit in PHP file.