Hi, On 10/7/19 10:47 PM, Christoph wrote: > The output of topSlow() including the 'Rest' line covers only about 1% > of the count shown in the 'Drops' counter so it is not related or is > topSlow() only about recent-ish slow queries?
Yes, both topSlow() and grepq() are based on the queries and responses present in the in-memory ring buffer, and we only keep up to N of them. You can tune N by using the setRingBuffersSize() [1] directive, the default being 10k. The drawbacks of doing so are a small increase in memory usage and if you set it to a very large value that scanning the ring buffer, for example to compute dynamic block rules, takes a bit longer. > (there is no column description in the output, I assume the 3rd column > is number of requests?) Yes. [1]: https://dnsdist.org/reference/config.html?highlight=setring#setRingBuffersSize Best regards, -- Remi Gacogne PowerDNS.COM BV - https://www.powerdns.com/
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