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read_ahead

Syntax:	`read_ahead size;`
Default:	`read_ahead 0;`
Context:	`http`, `server`, `location`

Sets the amount of pre-reading for the kernel when working with file.

On Linux, the posix_fadvise(0, 0, 0, POSIX_FADV_SEQUENTIAL) system call is used, and so the size parameter is ignored.

On FreeBSD, the fcntl(O_READAHEAD, size) system call, supported since FreeBSD 9.0-CURRENT, is used. FreeBSD 7 has to be patched.

Links:

https://nginx.org/en/docs/http/ngx_http_core_module.html#read_ahead

doc_nginx

2017-02-09 07:08:41

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