https://www.xga.ie/tags/zabbix/Recent content in Zabbix on XGAHugoen-gbMon, 30 Dec 2024 00:00:00 +0000https://www.xga.ie/posts/zabbix-dns-caching/Mon, 30 Dec 2024 00:00:00 +0000https://www.xga.ie/posts/zabbix-dns-caching/<p>DNS resolution started to feel a bit laggy recently, most notable on iOS devices. When I went down the troubleshooting rabbit-hole, I found a large number of DNS queries from the Zabbix monitoring infrastructure.</p> <p>Of the 37 hosts that are monitored by Zabbix, only 16 have DNS lookups for the hostnames. This caused multiple lookups per second for each host - thousands of entries per 10 minutes.</p> <figure><img src="https://www.xga.ie/posts/zabbix-dns-caching/image.png" alt="Effect of DNS caching" width="100%"><figcaption> <p>Effect of DNS caching</p>