I have three sets of CACTI:

1. 0.8.8a+php5.3.3+rrdtool1.4.9
2. 0.8.8h+php5.6.40+rrdtool1.4.8
3. 1.2.20+php7.2+rrdtool1.7.2

For example, the 5-minute data in September should be 12 * 24 * 30=8640 pieces of data, and 8640*0.05 is 432, which should be calculated from the 433rd piece of data.

But they are handled separately as follows:

1. Some are 432, some are 433, I can't find their running rules
2. Always 433 (correct)
3. It is always 432 (the number is limited and the statistics are not accurate)

I looked at the graph_variables.php code for 0.8.8a and 0.8.8h, they are all the same, don't know why this is the result.