Total Bandwidth and 95 percentile requires a lot of CPU

[Guest]

I use some big rrd files ( for example, yearly is 1 minute average with 527100 rows ). After 2 weeks, it seems that it takes a very long time to display the forth graph (yearly). The graph use total bandwidth AND 95 percentile.

If I use 2 graphs, one with total bandwidth and the other one with 95 percentile, the time is somewhat lower.

I wonder how much will take to display the graph after it collects values for a year ?

I changed the template to Interface - Traffic (bits/sec) and after that the graph is displayed instantly. So the reason must be the php functions who calculates total bandwidth and 95 percentile.

Is there a way to make this functions run faster?

The machine on wich cacti runs is a P4 2800 with HT, 1GB memory and Fedora Core1.

[Guest]

I forget to tell that i'm using cacti cacti-0.8.6-pre20040824