Re: Difference between request-hit-ratio and bytes-hit-ratio

On Fri, 17 Dec 1999, Jan Van Ham wrote:

]I was wondering what the difference is between these 2 items in the
]cache-manager :
]
]Request Hit Ratios : 5 min XX % and 60 min YY %
]Byte Hit Ratios: 5 min XX % and 60 min YY %
]
]They differ a lot ?

They are similar, but do differ. One is the ratio of all request divided
by the requests which were HITs, and the other is the ratio of the
complete size of all objects delivered divided by the size satisfied by
this cache:

        Request Hit Ratios: 5min: 25.0%, 60min: 24.0%
        Byte Hit Ratios: 5min: 10.0%, 60min: 12.7%

]I've defined 15 dns-children to be sure on dns-resolvement-load ...but
]why is the "avg service time: 4676 msec" => 4.6 seconds ??? This should
]be much lower no ??

No, not really. Try to "time nslookup some.obscure.domain". Depending on
your name service configuration, packet loss on international link (to the
root nameservers) etc. you can indeed wait several seconds for a
resolution, compare with:

http://statistics.www-cache.dfn.de/Mrtg/parallel.phtml?type=dnstime&kind=daily

Le deagh dhùrachd,
Dipl.-Ing. Jens-S. Vöckler (voeckler@rvs.uni-hannover.de)
Institute for Computer Networks and Distributed Systems
University of Hanover, Germany; +49 511 762 4726
Received on Fri Dec 17 1999 - 06:28:31 MST