As mentioned before, the init.d commands dump, show and mrtg fetch data from a running PDNS process. Especially mrtg is powerful - it outputs data in a format that is ready for processing by the MRTG graphing tool. MRTG can make insightful graphics on the performance of your nameserver, enabling the operator to easily spot trends. A sample mrtg.conf:
Interval: 5 WorkDir: /var/www/mrtg WriteExpires: yes Options[_]: growright,nopercent XSize[_]: 600 #--------------------------------------------------------------- Target[udp-queries]: `/etc/init.d/pdns mrtg udp-queries udp-answers` Options[udp-queries]: growright,nopercent,perminute MaxBytes[udp-queries]: 600000 AbsMax[udp-queries]: 600000 Title[udp-queries]: Queries per minute PageTop[udp-queries]: <H2>Queries per minute</H2> WithPeak[udp-queries]: ymwd YLegend[udp-queries]: queries/minute ShortLegend[udp-queries]: q/m LegendI[udp-queries]: udp-questions LegendO[udp-queries]: udp-answers Target[perc-failed]: `/etc/init.d/pdns mrtg udp-queries udp-answers` Options[perc-failed]: growright,dorelpercent,perminute MaxBytes[perc-failed]: 600000 AbsMax[perc-failed]: 600000 Title[perc-failed]: Queries per minute, with percentage success PageTop[perc-failed]: <H2>Queries per minute, with percentage success</H2> WithPeak[perc-failed]: ymwd YLegend[perc-failed]: queries/minute ShortLegend[perc-failed]: q/m LegendI[perc-failed]: udp-questions LegendO[perc-failed]: udp-answers Target[packetcache-rate]: `/etc/init.d/pdns mrtg packetcache-hit udp-queries` Options[packetcache-rate]: growright,dorelpercent,perminute Title[packetcache-rate]: packetcache hitrate MaxBytes[packetcache-rate]: 600000 AbsMax[packetcache-rate]: 600000 PageTop[packetcache-rate]: <H2>packetcache hitrate</H2> WithPeak[packetcache-rate]: ymwd YLegend[packetcache-rate]: queries/minute ShortLegend[packetcache-rate]: q/m LegendO[packetcache-rate]: total LegendI[packetcache-rate]: hit Target[packetcache-missrate]: `/etc/init.d/pdns mrtg packetcache-miss udp-queries` Options[packetcache-missrate]: growright,dorelpercent,perminute Title[packetcache-missrate]: packetcache MISSrate MaxBytes[packetcache-missrate]: 600000 AbsMax[packetcache-missrate]: 600000 PageTop[packetcache-missrate]: <H2>packetcache MISSrate</H2> WithPeak[packetcache-missrate]: ymwd YLegend[packetcache-missrate]: queries/minute ShortLegend[packetcache-missrate]: q/m LegendO[packetcache-missrate]: total LegendI[packetcache-missrate]: MISS Target[latency]: `/etc/init.d/pdns mrtg latency` Options[latency]: growright,nopercent,gauge MaxBytes[latency]: 600000 AbsMax[latency]: 600000 Title[latency]: Query/answer latency PageTop[latency]: <H2>Query/answer latency</H2> WithPeak[latency]: ymwd YLegend[latency]: usec ShortLegend[latency]: usec LegendO[latency]: latency LegendI[latency]: latency