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This problem is called "gaps" in the forums. It's caused by a failure to get data via snmp, or a failure to record data into the datafile (RRD). The first is commonly solved by increasing the timeout on the device or fixing the load problems so the device responds. The second is more complicated.
This problem is called "gaps" in the forums. It's caused by a failure to get data via snmp, or a failure to record data into the datafile (RRD). The first is commonly solved by increasing the timeout on the device or fixing the load problems so the device responds. The second is more complicated.
BIGHard wrote:it's not a snmp timeout problem for me. nor a rrd tool write problem.
The bigger your install gets the more likely you will see this problem. Check your cacti.log. You can grep for this string "Potential Data Source Issues for Data Sources". Check those datasources, fix -- (sometimes delete) -- as necessary.
Another common reason for gaps is if the poller has run out of time. If it can't write your data RRD will only cover ~2 poller cycles before gapping. So try to do things to speed up your poller cycles :: spine, increase php memory, use rrdtool-1.2.26+, move the database off the cacti server, change your scripts to be more efficient, etc.
