Daniel Mitterdorfer 0a6f40c7f5 Enable HTTP compression by default with compression level 3
With this commit we compress HTTP responses provided the client
supports it (as indicated by the HTTP header 'Accept-Encoding').

We're also able to process compressed HTTP requests if needed.

The default compression level is lowered from 6 to 3 as benchmarks
have indicated that this reduces query latency with a negligible
increase in network traffic.

Closes #7309
2016-05-03 08:53:15 +02:00

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[[breaking_50_http_changes]]
=== HTTP changes
==== Compressed HTTP requests are always accepted
Before 5.0, Elasticsearch accepted compressed HTTP requests only if the setting
`http.compressed` was set to `true`. Elasticsearch accepts compressed requests
now but will continue to send compressed responses only if `http.compressed`
is set to `true`.