oops i used version 2.78. sorry for the trouble :( בתאריך יום ד׳, 8 בינו׳ 2025 ב-23:34 מאת Gilad Moav <gmo...@gmail.com >:
> another weird one: just did a quick `dig tcp3.sub.mov.lat +tcp` which only > has 1 A RR. it successfully resolved and forwarded, but it doesn't show in > the cache. > >> Hi, I wanted to share an observation regarding Dnsmasq's cache behavior >> that might warrant attention. >> >> It seems that if a DNS response exceeds the configured cache size, >> issuing a new DNS request causes Dnsmasq to flush its entire cache. >> >> This behavior is easily reproducible: >> >> 1. Request a DNS resolution for kong.sub.mov.lat (ensuring you're using >> EDNS with the truncation flag, or DNS over TCP). >> 2. After the response, request the resolution of any other domain. >> >> Upon doing so, the entire cache is wiped, leaving only the latest >> response in the cache. >> >> From what I’ve gathered, it appears that all entries related to the >> oversized response are treated as a single entity within the cache. When a >> new response is cached, instead of freeing just enough space for the new >> entry, the system flushes the entire cache. >> >> Please let me know your thoughts on this or if further clarification is >> needed. >> >> Best regards, >> Gilad. >> >
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