I too have made some attemps to change the default step in cacti, and have had mixed results.
First, keep in mind the default php poller is not very fast. If you are monitoring alot of devices 1 minute will not be enough to poll them all.
Second, you will need to change the default RRAs that match the steps you want to create. The best place to find how to do this is the RRD tutorial on rrdtool.org.
Third, you will need to change the default step and heartbeat in the data templates. The easiest way to do this is from mysql. You would make the following changes:
Code: Select all
UPDATE data_template_data SET rrd_step=60 WHERE rrd_step=300;
UPDATE data_template_rrd SET rrd_heartbeat=120 WHERE rrd_heartbeat=600;
Fourth, you will need to change your cron job to run every minute.
Like I mentioned, I haven't been able to get Cacti working with a nondefault step. The biggest problem I had was that there were obvious differences between the graph previews and the graphs themselves. That left my boss a little confused
good luck.
