gzip  on;
gzip_http_version  1.1;
gzip_disable "MSIE [1-6]\.";
gzip_proxied any;
gzip_min_length 3000; #最小压缩文件大小
gzip_comp_level 2; #压缩比率1--9
gzip_buffers 4 512k; #压缩缓冲区
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript application/css application/x-httpd-php image/jpeg image/gif image/png;
gzip_vary off; #前端服务缓存压缩
output_buffers 4 512k; #输出缓冲区
postpone_output 5460; #输出缓冲区