The polling rate increases after a configuration update.

[ankcn]

In my settings, the polling interval is set to three minutes. After some time of work (probably after a regular update of the MRTG configuration file), the frequency of polling targets goes astray. Instead of once every three minutes, the same target is polled twice in the same interval. Later, the polling frequency increases even more, and the frequency of updating RDD files, on the contrary, decreases.

Below is a dump of outgoing SNMP packets. It shows that requests leave 3-4 times more often than required.
09:08:51 IP mrtg-server.44287 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:09:55 IP mrtg-server.38991 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:10:37 IP mrtg-server.46329 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:11:22 IP mrtg-server.42586 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:12:16 IP mrtg-server.60945 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:13:40 IP mrtg-server.58703 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:14:02 IP mrtg-server.56478 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:14:57 IP mrtg-server.58749 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
The MRTG process here has been restarted and the polling frequency has returned to its normal value of once every three minutes.
09:15:44 IP mrtg-server.55147 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:18:46 IP mrtg-server.57360 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:21:43 IP mrtg-server.56474 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100
09:24:44 IP mrtg-server.52581 > router-1.161: C="public" GetRequest(50) ifHCInOctets.100

RRD file updating (every 9 minutes):
-rw-r--r--. 1 owner owner 122368 Sep 5 08:26 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 08:35 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 08:44 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 08:54 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:03 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:12 router-1_Fa0.rrd
MRTG restart.
-rw-r--r--. 1 owner owner 122368 Sep 5 09:16 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:19 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:22 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:25 router-1_Fa0.rrd
-rw-r--r--. 1 owner owner 122368 Sep 5 09:28 router-1_Fa0.rrd

Configuration file contents (without targets):
EnableIPv6: no
WorkDir: /path
IconDir: /icon-path
Options[]: growright,bits,nolegend,nobanner
RunAsDaemon: Yes
LogFormat: rrdtool
Interval: 3
NoDetach: Yes
YSize[]: 222
SnmpOptions: retries => 5, timeout => 3
Forks: 9
WithPeak[_]: y

[oetiker]

not a pattern I know ... what configuration did you change ?

[ankcn]

Target settings are updated daily. Some are added, others are removed.