Where is the DNS cache stored #2280
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Maybe this is a dumb question, but I did not find a clear explanation among other users comments, but where is the DNS cache stored, how to clear it, and are there any diagnostic commands to get information about the cache? |
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Replies: 1 comment 2 replies
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DNS records are small and ephemeral, so they are cached in memory. Restarting the proxy will clear it. And when query logging is enabled, you can see for every query whether the response came directly from the cache, or if it required a request to an upstream server. |
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Thank you very much for the explanation. Is there any point in creating a local cache with additional software? |
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Doesn't whether they are ephemeral depend on cache's TTL? What if I set some high value, for example 1 week for |
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DNS records are small and ephemeral, so they are cached in memory.
Restarting the proxy will clear it.
And when query logging is enabled, you can see for every query whether the response came directly from the cache, or if it required a request to an upstream server.