http {
    # 基本语法
    # access_log path [format [buffer=size] [gzip[=level]] [flush=time] [if=condition]];

    # 定义日志格式
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    # 使用日志格式
    access_log /var/log/nginx/access.log main;

    # 带缓冲的日志（提高性能）
    access_log /var/log/nginx/access.log main buffer=32k flush=5s;

    # 压缩日志
    access_log /var/log/nginx/access.log.gz main gzip=9 buffer=32k;

    server {
        # 站点专用日志
        access_log /var/log/nginx/example.access.log main;

        # 关闭特定路径的日志
        location /health {
            access_log off;
            return 200 "OK";
        }

        # 静态资源不记录日志
        location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
            access_log off;
        }
    }
}