20 lines
1.2 KiB
Plaintext
20 lines
1.2 KiB
Plaintext
[[networkaddress-cache-ttl]]
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=== DNS cache settings
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Elasticsearch runs with a security manager in place. With a security manager in
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place, the JVM defaults to caching positive hostname resolutions indefinitely
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and defaults to caching negative hostname resolutions for ten
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seconds. Elasticsearch overrides this behavior with default values to cache
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positive lookups for sixty seconds, and to cache negative lookups for ten
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seconds. These values should be suitable for most environments, including
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environments where DNS resolutions vary with time. If not, you can edit the
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values `es.networkaddress.cache.ttl` and `es.networkaddress.cache.negative.ttl`
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in the <<jvm-options,JVM options>>. Note that the values
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http://docs.oracle.com/javase/8/docs/technotes/guides/net/properties.html[`networkaddress.cache.ttl=<timeout>`]
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and
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http://docs.oracle.com/javase/8/docs/technotes/guides/net/properties.html[`networkaddress.cache.negative.ttl=<timeout>`]
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in the
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http://docs.oracle.com/javase/8/docs/technotes/guides/security/PolicyFiles.html[Java
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security policy] are ignored by Elasticsearch unless you remove the settings for
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`es.networkaddress.cache.ttl` and `es.networkaddress.cache.negative.ttl`.
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