<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div style="line-height: 1.7;"><div style="color: rgb(0, 0, 0); font-family: Arial; font-size: 14px;">Hello everyone</div><div style=""><div style="">[root@ops-dns-recursor-3 ~]# rec_control get-all|grep cache</div><div style="">cache-entries<span style="white-space:pre">        </span>121</div><div style="">cache-hits<span style="white-space:pre">      </span>0</div><div style="">cache-misses<span style="white-space:pre">      </span>12</div><div style="">max-cache-entries<span style="white-space:pre">        </span>3000000</div><div style="">max-packetcache-entries<span style="white-space:pre">     </span>500000</div><div style="">negcache-entries<span style="white-space:pre">     </span>4</div><div style="">packetcache-entries<span style="white-space:pre">       </span>7</div><div style="">packetcache-hits<span style="white-space:pre">  </span>51</div><div style="">packetcache-misses<span style="white-space: pre;">     </span>12</div></div><div style="color: rgb(0, 0, 0); font-family: Arial; font-size: 14px;">I don't know if the data monitored on my authoritative node is normal, but it seems that there is a high probability that the miss will be lost. How can I optimize it?</div></div><br><br><span title="neteasefooter"><p><br> </p></span></div><br><br><span title="neteasefooter"><p><br/> </p></span>