<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Kiran,<div class=""><br class=""></div><div class="">There's no obvious answer based on the info you have us. How is the server configured? Anything special? Who is using your resolver?</div><div class=""><br class=""></div><div class="">Assuming it's a "plain and simple" resolver with good Internet connectivity, I would start to investigate which queries are slow, and why you have so many of them. You could do that in various ways, I would suggest to use dnsdist to do that: it has a "topSlow()" command that will display the slowest queries.</div><div class=""><br class=""></div><div class="">Then, start checking them, you might even enable tracing in pdns on those names and investigate the results.</div><div class=""><br class=""></div><div class="">Best of luck in your hunting expedition!</div><div class=""><br class=""></div><div class="">Frank Louwers</div><div class="">Certified PowerDNS Consultant @ <a href="http://Kiwazo.be" class="">Kiwazo.be</a></div><div class=""><br class=""></div><div class="">PS: Recursor 4.1.x is very old and no longer supported, it doesn't even get any security updates anymore! I would recommend to migrate to 4.4.1.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 9 Dec 2020, at 08:30, Kiran Kumar via Pdns-users <<a href="mailto:pdns-users@mailman.powerdns.com" class="">pdns-users@mailman.powerdns.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div class="yahoo-style-wrap" style="font-family:lucida console, sans-serif;font-size:16px;"><div dir="ltr" data-setdir="false" class="">Hello,</div><div dir="ltr" data-setdir="false" class=""><br class=""></div><div dir="ltr" data-setdir="false" class="">How do we minimize answers-slow, We are running on <span class="">CentOS Linux release 7.9.2009 (Core)</span></div><div dir="ltr" data-setdir="false" class="">on VM with 4VCPUs and 16GB RAM. </div><div dir="ltr" data-setdir="false" class=""><br class=""></div><div dir="ltr" data-setdir="false" class=""><div class=""><div class="">rec_control get-all | grep answer</div><div class=""><b class="">answers-slow 80903</b></div><div class="">answers0-1 598471</div><div class="">answers1-10 1057756</div><div class="">answers10-100 2342082</div><div class="">answers100-1000 1341675</div><div class="">auth4-answers-slow 119250</div><div class="">auth4-answers0-1 61649</div><div class="">auth4-answers1-10 1423348</div><div class="">auth4-answers10-100 3095598</div><div class="">auth4-answers100-1000 1515725</div><div class="">auth6-answers-slow 0</div><div class="">auth6-answers0-1 0</div><div class="">auth6-answers1-10 0</div><div class="">auth6-answers10-100 0</div><div class="">auth6-answers100-1000 0</div><div class="">noerror-answers 16875858</div><div class="">nxdomain-answers 2726842</div><div class=""><b class="">servfail-answers 1780021</b></div></div><div class=""><b class=""><br class=""></b></div><div dir="ltr" data-setdir="false" class=""><b class="">Are there any parameters that needs to enabled in recursor.conf so that the performance of DNS queries can be further improved.</b></div><div class=""><b class=""><br class=""></b></div><div dir="ltr" data-setdir="false" class=""><b class="">Best Regards,</b></div><div dir="ltr" data-setdir="false" class=""><b class=""><br class=""></b></div><div dir="ltr" data-setdir="false" class=""><b class="">Kiran</b></div><br class=""></div></div></div>_______________________________________________<br class="">Pdns-users mailing list<br class=""><a href="mailto:Pdns-users@mailman.powerdns.com" class="">Pdns-users@mailman.powerdns.com</a><br class=""><a href="https://mailman.powerdns.com/mailman/listinfo/pdns-users" class="">https://mailman.powerdns.com/mailman/listinfo/pdns-users</a><br class=""></div></blockquote></div><br class=""></div><div class=""><div class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: "Avenir Next"; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">Frank Louwers<br class="">PowerDNS Certified Consultant @ <a href="http://Kiwazo.be" class="">Kiwazo.be</a><br class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: "Avenir Next"; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><br class="Apple-interchange-newline"></div></div><br class="Apple-interchange-newline"></div></div></body></html>