6 The HTTP Server - 6.27 Configuring the HTTP Server - 《Micronaut v2.1.4 Documentation》

The following example shows how to tweak configuration options for the server via :

Configuring HTTP server settings

Table 1. Configuration Properties for NettyHttpServerConfiguration
Property	Type	Description
`micronaut.server.netty.child-options`	java.util.Map	Sets the Netty child worker options.
`micronaut.server.netty.options`	java.util.Map	Sets the channel options.
`micronaut.server.netty.max-initial-line-length`	int	Sets the maximum initial line length for the HTTP request. Default value (4096).
`micronaut.server.netty.max-header-size`	int	Sets the maximum size of any one header. Default value (8192).
	int	Sets the maximum size of any single request chunk. Default value (8192).
	boolean	Sets whether chunked transfer encoding is supported. Default value (true).
`micronaut.server.netty.validate-headers`	boolean	Sets whether to validate incoming headers. Default value (true).
`micronaut.server.netty.initial-buffer-size`	int	Sets the initial buffer size. Default value (128).
`micronaut.server.netty.log-level`	io.netty.handler.logging.LogLevel	Sets the Netty log level.
`micronaut.server.netty.compression-threshold`		Sets the minimum size of a request body must be in order to be compressed. Default value (1024).
`micronaut.server.netty.compression-level`	int	Sets the compression level (0-9). Default value (6).
`micronaut.server.netty.use-native-transport`	boolean	Sets whether to use netty’s native transport (epoll or kqueue) if available . Default value (false).
	java.lang.String	Sets the fallback protocol to use when negotiating via ALPN.

The native Netty transports add features specific to a particular platform, generate less garbage, and generally improve performance when compared to the NIO based transport.

To enable native transports first add a necessarily dependency:

For macOS:

runtime("io.netty:netty-transport-native-kqueue:osx-x86_64")

For Linux:

Then configure the default event loop group to prefer native transports:

micronaut:
    netty:
            default: