Nginx the gzip configuration parameters in the server _nginx

Gzip (Gun-zip) is a compression technology, after gzip compressed page size can be turned into the original 30% or smaller.

Users browse the page when the speed will also be faster, gzip compressed pages need to serve the browser at the same time support, service-side compression reached

Browser to extract and parse, now most browsers have supported the resolution of gzip-enabled pages

Gzip Use Environment: http,server,location,if (x), generally I define it in the nginx.conf http{...} Between
gzip on;

Turn on gzip off
Gzip_min_length 1k;

Set the minimum byte to allow compression (obtained from the header's Content-length) recommendation is greater than 1k
gzip_buffers 4 16k;

Request Memory in 16k, 4 times times the size of the original data in 16k
Gzip_http_version 1.1;

Identify the version of the HTTP protocol, early browsers may not support gzip self-extracting, users will see garbled
Gzip_comp_level 2;

Level 1-9 the smallest compression is the fastest but consumes the CPU
gzip_types text/plain application/x-javascript text/css application/xml;

Matching compression type
gzip_vary on;

Enable the answer header "Vary:accept-encoding"

Gzip_proxied off;

Nginx is enabled when the reverse proxy, off (compression of data that turns off all proxy results), expired (enable compression, if the header includes "Expires" header information), No-cache (enable compression, header header contains " Cache-control:no-cache "), No-store (enable compression, header header contains" Cache-control:no-store "), private (enable compression, header header contains" Cache-control:private "), no_last_modefied (enable compression, header header does not contain" last-modified "), No_etag (enable compression, if header header does not include" ETag "header information) , auth (Enable compression if header header contains "Authorization" header information)
gzip_disable msie6;

(IE5.5 and IE6 SP1 use the MSIE6 parameter to prevent gzip compression) specify which browsers that do not need gzip compression (will match user-agents) and rely on the Pcre library

Gzip
decide whether to open the Gzip module
Example

gzip on;

Gzip_buffers
set the size of the gzip request memory to request memory space by a multiple of the block size
Param2:int (k) the rear unit is K
Example

Gzip_buffers 4 8k;

Gzip_comp_level
set the GZIP compression level, the lower the level of compression faster file compression than the smaller, whereas slower file compression than the larger
Param:1-9
Example

Gzip_com_level 1;

Gzip_min_length
when the return content is greater than this value, gzip is used for compression, in K, at 0 o'clock, all pages are compressed
Param:int
Example

Gzip_min_length 1000;

Gzip_types
sets the MIME type that needs to be compressed, and the non-set value is not compressed
Param:text/html|application/x-javascript|text/css|application/xml
Example

Gzip_types text/html;

For most text-oriented sites, the content of the text itself accounted for the vast majority of traffic. Although the volume of a single text is not large, the flow is considerable if there is a large number of them. After enabling gzip, you can drastically reduce the amount of traffic you need. The above code can be inserted into HTTP {...} In the configuration of the entire server, you can also insert into the virtual host's server {...} Or in the location module below.