opitmizing nginx on ubuntu 14.04

Hello, i couldn’t find any tutorial for nginx optimization on ubuntu 14.04 unless this one which is for debian actually. https://www.digitalocean.com/community/tutorials/how-to-optimize-nginx-configuration

so i replace codes in my nginx configuration (/etc/nginx/nginx.conf) like this way. could someone confirm i have done it correct or should i change any value as im on the smallest droplet package and installed wordpress (512mb).

please check the bottom part. im actually confused with those 2 http heads

i really appreciate your help guy’s

user www-data;
worker_processes 1;
pid /run/nginx.pid;

events {
worker_connections 1024;
# multi_accept on;
}

http {

##
# Basic Settings
##

sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;

# server_names_hash_bucket_size 64;
# server_name_in_redirect off;

include /etc/nginx/mime.types;
default_type application/octet-stream;

##
# Logging Settings
##

access_log off;
error_log /var/log/nginx/error.log;

##
# Gzip Settings
##

gzip on;
gzip_disable "msie6";

gzip_vary on;
gzip_proxied any;
gzip_comp_level 2;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

##
# nginx-naxsi config
##
# Uncomment it if you installed nginx-naxsi
##

#include /etc/nginx/naxsi_core.rules;

##
# nginx-passenger config
##
# Uncomment it if you installed nginx-passenger
##

#passenger_root /usr;
#passenger_ruby /usr/bin/ruby;

##
# Virtual Host Configs
##

include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;

# snipping other settings for brevity.

#...
client_max_body_size 8m;
#...
}

#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
# server {
# listen localhost:110;
# protocol pop3;
# proxy on;
# }
#
# server {
# listen localhost:143;
# protocol imap;
# proxy on;
# }
#}

http {

# snipping other settings for brevity.

client_body_timeout 12;
client_header_timeout 12;
keepalive_timeout 15;
send_timeout 10;
}

http {

# client body buffer.

client_body_buffer_size 10K;
client_header_buffer_size 1k;
large_client_header_buffers 2 1k;
}