Detailed explanation of how to set the change value within a specified time in Zabbix

Background description: On an existing load balancing device, there is an indicator that is in a value-added state (it will only increase and not decrease, and it is probably an indicator value for calculating the total amount). However, the value of the total amount calculation is of little reference significance. What I need more is its change value within a specified time.

The original monitoring item is a continuously incremental data. As shown in Figure 1 and Figure 2.

Figure 1

Figure 2

Add the variable data per minute for this monitoring item. As shown in Figure 3 and Figure 4.

Figure 3

The oid remains unchanged, but the name and key value are customized.

Figure 4

Add a new booking step "Simple Change" to this new monitoring item. It means to perform the difference operation on the values ​​before and after (the last one or two). The final result is shown in Figure 5.

Figure 5

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