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     2 <body>
       
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    10 <h1>PowerDNS Recursor Performance Graphs</H1>
       
    11 <table border=1>
       
    12 <tr><td>Questions</td><td>End-user initiated DNS questions</td></tr>
       
    13 <tr><td>Out-queries</td><td>Recursor initiated questions to other
       
    14 nameservers</td></tr>
       
    15 <tr><td>Throttled</td><td>If a certain nameserver is not responding, or if
       
    16 it is, but returning unuseful answers, it is not useful to keep repeating
       
    17 identical queries. If PowerDNS prevents a duplicate query, and therefore
       
    18 prevents needless server load and delays, this is called a 'throttled
       
    19 out-query'</td></tr>
       
    20 <tr><td>Outgoing timeout</td><td>An out-query that did not generate an
       
    21 answer within 1 or 2 seconds</td></tr>
       
    22 <tr><td>Noerror answer</td><td>A Question that was answered without an error
       
    23 status</td></tr>
       
    24 <tr><td>NXDOMAIN answer</td><td>A Question that was answered with a positive
       
    25 indication that there is no answer</td></tr>
       
    26 <tr><td>SERVFAIL answer</td><td>No answer could be given because the nameservers
       
    27 carrying the answer did not respond, or were throttled</td></tr>
       
    28 <tr><td>Cache hits/misses</td><td>A query is judged a cache-hit if it could
       
    29 be answered without generating any out-queries</td></tr>
       
    30 <tr><td>User/System CPU usage</td><td>Actual amount of CPU used exclusively
       
    31 by the recursor, either in user or in system (kernel) mode</td></td>
       
    32 </table>
       
    33 <img src="latencies-week.png">
       
    34 <br>
       
    35 <img src="qa-latency-week.png">
       
    36 <br>
       
    37 <img src="qoutq-week.png">
       
    38 <br>
       
    39 <img src="timeouts-week.png">
       
    40 <br>
       
    41 <img src="questions-week.png">
       
    42 <br>
       
    43 <img src="tcp-questions-week.png">
       
    44 <br>
       
    45 <img src="caches-week.png">
       
    46 <br>
       
    47 <img src="caches2-week.png">
       
    48 <br>
       
    49 <img src="load-week.png">
       
    50 <br>
       
    51 <img src="hitrate-week.png">
       
    52 <br>
       
    53 <img src="packet-errors-week.png">
       
    54 
       
    55 </body>
       
    56 </html>