How to see specific time in RRD graphs?



  • Hi Everyone,

    I am looking at the RRD graphs and it shows 4 hours, 1 day, 1 month, 1 year, etc….So, I have few picks I want to focus on and zoom into. Is it possible that I can customize the RRD graph to see exactly when those peaks happened or is the data purged?

    See attached picture, please.

    Thanks



  • Rebel Alliance Developer Netgate

    There isn't really any way to 'zoom' like that, and the way the RRD databases summarize info over time, you probably wouldn't get any additional detail anyhow.

    Over time, rrd will summarize larger and larger chunks together. Only the most current data is kept in a way that lets you see small slices of time.

    You could have a monitoring system like Cacti poll via snmp and keep the data longer. There are tweaks for Cacti (and probably others) that let you keep the more detailed data longer, but it will use a lot of disk space for RRD graphs if you do that. Far more than you would want to be used on a router.



  • Thanks jimp.

    1- If I am not wrong there is an snmp package on pfsense but I have never worked with snmp. I am exploring Cacti now. So, would cacti try to connect to snmpd or does snmpd connect to cacti and give it the information? (I want to know for security reason so I know which ports need to be opened or not)

    2- Would using syslog to send logs over the internet and the snmp logs use a lot of my bandwidth or otherwise stress the router if I am planning to log everything?

    Thanks,


  • Rebel Alliance Developer Netgate

    @torontob:

    1- If I am not wrong there is an snmp package on pfsense but I have never worked with snmp. I am exploring Cacti now. So, would cacti try to connect to snmpd or does snmpd connect to cacti and give it the information? (I want to know for security reason so I know which ports need to be opened or not)

    SNMP is built-in, Services > SNMP. Just enable it and the modules listed on the screen. Cacti would connect to the pfSense box via snmp and gather the info. A standard unix host template in Cacti should get the right info, if I remember right. You'd just need to allow udp/161 from the box running Cacti to the router.

    @torontob:

    2- Would using syslog to send logs over the internet and the snmp logs use a lot of my bandwidth or otherwise stress the router if I am planning to log everything?

    It wouldn't use a ton of bandwidth in most cases really, but I wouldn't do either of those in the clear across a WAN link. If you must do that to a remote box, setup a VPN for it.


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