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<p><a name="_MailEndCompose"><span lang="EN-US"><o:p> </o:p></span></a></p>
<p><span lang="EN-US">Hello, I am running a resolver server using bind. I am currently using bind 9.11, and I am going to update it to 9.16. However, compared to 9.11, 9.16 is only half the performance. I'm asking for a solution to anyone who has experienced
 the same problem as me. And I have 20 threads, but only use 1 of them. I also tried the named option -n , but it didn't give me any better performance.</span><span lang="EN-US"><o:p></o:p></span></p>
<p><span lang="EN-US">Performance measurement command: resperf -d normal_20210906.txt -s 59.18.54.71 -i 1 -L 2 ?P test.gnuplot -e -r 60<o:p></o:p></span></p>
<p><span lang="EN-US">bind 9.11 performance: 97333 qps<o:p></o:p></span></p>
<p><span lang="EN-US">bind 9.16 performance: 39100 qps <o:p></o:p></span></p>
<p><span lang="EN-US">How can I solve this?<o:p></o:p></span></p>
<p><span lang="EN-US">[Test environment]<o:p></o:p></span></p>
<ul type="disc">
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<span lang="EN-US">Equipment: Dell R640 (CPU Intel Xeon Gold 5215 cpu @ 2..50GHz, 10core)<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:left;mso-list:l0 level1 lfo1;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all">
<span lang="EN-US">OS : Centos Linux release 7.9<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:left;mso-list:l0 level1 lfo1;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all">
<span lang="EN-US">BIND version: 9.16.21<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:left;mso-list:l0 level1 lfo1;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all">
<span lang="EN-US">LIBRARY : libuv-1.35.0 / openssl-1.0.2k-16/ glibc-2.17-260<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:left;mso-list:l0 level1 lfo1;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all">
<span lang="EN-US">build option : starting BIND 9.16.21 (Extended Support Version) id:a8aa450 running on Linux x86_64 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 built with '--prefix=/usr/local' '--sysconfdir=/usr/local/etc' '--localstatedir=/var/named'
 '--disable-auto-validation' running as: named -u named compiled by GCC 4.8..5 20150623 (Red Hat 4.8.5-36) compiled with OpenSSL version: OpenSSL 1.0.2k-fips 26 Jan 2017 linked to OpenSSL version: OpenSSL 1.0.2k-fips 26 Jan 2017 compiled with zlib version: 1.2.7
 linked to zlib version: 1.2.7<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="page-break-after:avoid"><span lang="EN-US"><img width="358" height="308" id="±×¸²_x0020_13" src="cid:image002.png@01D7E58A.209E1EC0"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoCaption" align="left" style="text-align:left"><span lang="EN-US">[Network diagram]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<span lang="EN-US" style="color:#1F497D">Bind 9.16.21</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="color:#1F497D">Bind 9.11.31</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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