Julian Fernandes's questions

I'm facing an issue here and after four days of looking around I decided to ask for some help here, after all a million heads can think a lot better than one.

I have a Ubuntu 14.04 server setup with NGINX, HHVM, PHP5-FPM (as a backup), Percona MySQL, Memcached (which will be replaced by Redis). I have fastcgi_cache setup for WordPress and object caching done over memcached. All cool and dandy in theory, but not in practice.

This is a RamNode OpenVZ SSD VPS with 2GB of RAM and an Intel Xeon E5 with two cores for my VPS.

Running Blitz.io on it the server is getting absolutely murdered by the two NGINX worker processes, which each one using 100% CPU according to top and htop. I usually run with the following pattern:

--pattern 999-1000:60 https://www.geeksune.com/blog/hello-world/

That makes makes CPU go to the roof and according to Blitz.io this is the result of that:

135 HITS WITH 57,734 ERRORS & 234 TIMEOUTS

Obviously that isn't good. RAM usage stay under 250MB all the time and it seems that all those requests from Blitz.io are hitting the cache, as seen here:

54.232.204.19 - HIT [23/Nov/2014:19:06:32 -0200] "GET / HTTP/1.1" 200 7632 "-" "blitz.io; [email protected]"

Notice the HIT at the start. I set a new log format and added $upstream_cache_status to it.

A similar setup on the same machine works just fine with Blitz.io, so there is definitely something wrong with my NGINX setup and it seems related to fastcgi_cache. I have the same results every time, even with just PHP5-FPM with Zend.

Does anyone have a clue about what is happening? My configuration files look like this:

• /etc/nginx/nginx.conf - http://paste.ubuntu.com/9236266/
• /etc/nginx/sites-available/geeksune.com - http://paste.ubuntu.com/9236282/
• /etc/nginx/conf.d/includes/ssl.inc - http://paste.ubuntu.com/9236298/
• /etc/nginx/conf.d/includes/security.inc - http://paste.ubuntu.com/9236321/
• /etc/nginx/conf.d/includes/caching.inc - http://paste.ubuntu.com/9236353/
• /etc/nginx/conf.d/includes/locations.inc - http://paste.ubuntu.com/9236366/

Thanks in advance.

:)

Recently i got a project i'm working in financed by a friend. So he gave me access to a 60mbps dedicated connection link and a HP Compaq 8200 Elite.

The HP is just a desktop, but i'm using it as a server, since well... i can't afford a new VPS right now and it got some nice specs.

It have:

• Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz;
• 4GB RAM DDR3;
• 500GB HD 7200RPM.

Like i said, a desktop, but with some nice specs. So i installed Nginx, PHP-FPM, Percona's MySQL and APC, to run WordPress, the platform i will use for this project.

Nginx is configured to use microcache, since i find it faster than Varnish. The cache from nginx goes to RAM, using tmpfs. I also use WP-FFPC for "advanced cache", W3 Total Cache for CDN, minify and DB cache. APC Object Cache Backend for object cache and FX Gravatar for gravatar cache, all mounted to RAM.

So it seems like a good setup on my head, but when i started to do load tests, it seems not so great.

On Blitz.io i get 10~20 timeouts at every test i make, and it says i could get 9,699,500 hits/day, max. Pretty good, but problem is: on a low end VPS i run, with 512MB and 1.2GHz 1 core CPU, i get the same results, but without the timeouts.

Only difference is the VPS takes around 250ms to show the content, while the server takes only 60ms, but i think that is because of latency.

Anyway... my whole point here is: why the speed seems better, Blitz.io shows this server can handle the same my VPS handle, even if this server is like, 3x faster?

With Apache ab test, i also got only 15 req/sec... that seems REALLY low, since i see some people getting some insane numbers, even with WordPress.

I wonder if all of this is because my server is a desktop, maybe I/O related? Or network? Could you guys take a look at my settings and see if they are correct, or this is all my setting's fault, please?

Nginx configuration files

• nginx.conf: http://paste.ubuntu.com/1203836/
• fastcgi_params: http://paste.ubuntu.com/1203837/
• /sites-avaiable/default: http://paste.ubuntu.com/1203839/

PHP-FPM configuration files

• /pool.d/www.conf: http://paste.ubuntu.com/1203842/
• apc.so: http://paste.ubuntu.com/1203843/

MySQL configuration files

• my.cnf: http://paste.ubuntu.com/1203845/

So, can anyone help me out, please? I'm still doing tests, trying different settings to see what i can make, but nothing worked so far, been doing this for 2 days :/

Recently i setup a Ubuntu 12.04 VPS with 512mb/1ghz CPU, Nginx + php-fpm + Varnish + APC + Percona's MySQL server + CloudFlare Pro for our Ubuntu LoCo Team's WordPress blog. The blog get about 3~4k daily hits, use about 180MB and 8~20% CPU. Everything seems to be working insanely fast... page load is really good and is about 16x faster than any of our competitors... but there is one problem.

When we upload a image, WordPress don't resize it, so all we can do it insert the full image in the post. If the imagem have, let's say, 30kb, it resize fine... but if the image have 100kb+, it won't...

In nginx error logs i see this:

upstream timed out (110: Connection timed out) while reading response header from upstream, client: 150.162.216.64, server: www.ubuntubrsc.com, request: "POST /wp-admin/async-upload.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "www.ubuntubrsc.com", referrer: "http://www.ubuntubrsc.com/wp-admin/media-upload.php?post_id=2668&"

It seems to be related with the issue, but i dunno. When that timeout happens, i started to get it when i'm trying to view a post too:

upstream timed out (110: Connection timed out) while reading response header from upstream, client: 150.162.216.64, server: www.ubuntubrsc.com, request: "GET /tutoriais-gimp-6-adicionando-aplicando-novos-pinceis.html HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "www.ubuntubrsc.com", referrer: "http://www.ubuntubrsc.com/"

And only a restart of php5-fpm fix it.

I tryed increasing some timeouts and stuffs but it did not worked, so i guess it's some kind of limitation i did not figured yet. Could someone help me with it, please?

/etc/nginx/nginx.conf:

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

events {
    worker_connections 1024;
        use epoll;
    multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay off;
    keepalive_timeout 15;
        keepalive_requests 2000;
    types_hash_max_size 2048;
    server_tokens off;
        server_name_in_redirect off;

    open_file_cache max=1000 inactive=300s;
    open_file_cache_valid 360s;
    open_file_cache_min_uses 2;
    open_file_cache_errors off;

    server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

        client_body_buffer_size 128K;
        client_header_buffer_size 1k;
        client_max_body_size 2m;
        large_client_header_buffers 4 8k;

        client_body_timeout   10m;
        client_header_timeout 10m;
        send_timeout          10m;

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

    ##
    # Logging Settings
    ##

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

    ##
    # CloudFlare's IPs (uncomment when site goes live)
    ##

        set_real_ip_from   204.93.240.0/24;
        set_real_ip_from   204.93.177.0/24;
        set_real_ip_from   199.27.128.0/21;
        set_real_ip_from   173.245.48.0/20;
        set_real_ip_from   103.22.200.0/22;
        set_real_ip_from   141.101.64.0/18;
        set_real_ip_from   108.162.192.0/18;
        set_real_ip_from   190.93.240.0/20;
        real_ip_header     CF-Connecting-IP;
        set_real_ip_from   127.0.0.1/32;

    ##
    # Gzip Settings
    ##

    gzip on;
    gzip_disable "msie6";

    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 9;
        gzip_min_length  1000;
        gzip_proxied     expired no-cache no-store private auth;
    gzip_buffers 32 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/*;
}

/etc/nginx/fastcgi_params:

fastcgi_param   QUERY_STRING        $query_string;
fastcgi_param   REQUEST_METHOD      $request_method;
fastcgi_param   CONTENT_TYPE        $content_type;
fastcgi_param   CONTENT_LENGTH      $content_length;

fastcgi_param   SCRIPT_FILENAME     $request_filename;
fastcgi_param   SCRIPT_NAME     $fastcgi_script_name;
fastcgi_param   REQUEST_URI     $request_uri;
fastcgi_param   DOCUMENT_URI        $document_uri;
fastcgi_param   DOCUMENT_ROOT       $document_root;
fastcgi_param   SERVER_PROTOCOL     $server_protocol;

fastcgi_param   GATEWAY_INTERFACE   CGI/1.1;
fastcgi_param   SERVER_SOFTWARE     nginx/$nginx_version;

fastcgi_param   REMOTE_ADDR     $remote_addr;
fastcgi_param   REMOTE_PORT     $remote_port;
fastcgi_param   SERVER_ADDR     $server_addr;
fastcgi_param   SERVER_PORT     $server_port;
fastcgi_param   SERVER_NAME     $server_name;

fastcgi_param   HTTPS           $https;

fastcgi_send_timeout                    180;
fastcgi_read_timeout                    180;
fastcgi_buffer_size                     128k;
fastcgi_buffers                         256 4k;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param   REDIRECT_STATUS     200;

/etc/nginx/sites-avaiable/default:

##
# DEFAULT HANDLER
# ubuntubrsc.com
##

server {

    listen 8080;

    # Make site available from main domain
    server_name www.ubuntubrsc.com;

    # Root directory
    root /var/www;
    index index.php index.html index.htm;
        include /var/www/nginx.conf;
        access_log off;

    location / {
                try_files $uri $uri/ /index.php?q=$uri&$args;
        }

        location = /favicon.ico {
    log_not_found off;
    access_log off;
        }

        location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
        }

        location ~ /\. {
    deny all;
    access_log off;
    log_not_found off;
        }

        location ~* ^/wp-content/uploads/.*.php$ {
    deny all;
    access_log off;
    log_not_found off;
        }

        rewrite /wp-admin$ $scheme://$host$uri/ permanent;

    error_page 404 = @wordpress;
    log_not_found off;

    location @wordpress {
        include /etc/nginx/fastcgi_params;      
        fastcgi_pass unix:/var/run/php5-fpm.sock;
            fastcgi_param SCRIPT_NAME /index.php;
            fastcgi_param SCRIPT_FILENAME $document_root/index.php;
        }

    location ~ \.php$ {
                try_files $uri =404;

        include /etc/nginx/fastcgi_params;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        if (-f $request_filename) {
                fastcgi_pass unix:/var/run/php5-fpm.sock;
            }
    }
      }
server {
  listen 8080;
  server_name ubuntubrsc.* www.ubuntubrsc.net www.ubuntubrsc.org www.ubuntubrsc.com.br www.ubuntubrsc.info www.ubuntubrsc.in;
  return 301 $scheme://www.ubuntubrsc.com$request_uri;
}

/var/www/nginx.conf:

# BEGIN W3TC Minify cache
location ~ /wp-content/w3tc/min.*\.js$ {
    types {}
    default_type application/x-javascript;
    expires modified 31536000s;
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
    add_header Vary "Accept-Encoding";
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
}
location ~ /wp-content/w3tc/min.*\.css$ {
    types {}
    default_type text/css;
    expires modified 31536000s;
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
    add_header Vary "Accept-Encoding";
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
}
location ~ /wp-content/w3tc/min.*js\.gzip$ {
    gzip off;
    types {}
    default_type application/x-javascript;
    expires modified 31536000s;
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
    add_header Vary "Accept-Encoding";
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
    add_header Content-Encoding gzip;
}
location ~ /wp-content/w3tc/min.*css\.gzip$ {
    gzip off;
    types {}
    default_type text/css;
    expires modified 31536000s;
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
    add_header Vary "Accept-Encoding";
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
    add_header Content-Encoding gzip;
}
# END W3TC Minify cache
# BEGIN W3TC Browser Cache
gzip on;
gzip_types text/css application/x-javascript text/x-component text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;
location ~ \.(css|js|htc)$ {
    expires 31536000s;
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
}
location ~ \.(html|htm|rtf|rtx|svg|svgz|txt|xsd|xsl|xml)$ {
    expires 3600s;
    add_header Pragma "public";
    add_header Cache-Control "max-age=3600, public, must-revalidate, proxy-revalidate";
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
    try_files $uri $uri/ $uri.html /index.php?$args;
}
location ~ \.(asf|asx|wax|wmv|wmx|avi|bmp|class|divx|doc|docx|eot|exe|gif|gz|gzip|ico|jpg|jpeg|jpe|mdb|mid|midi|mov|qt|mp3|m4a|mp4|m4v|mpeg|mpg|mpe|mpp|otf|odb|odc|odf|odg|odp|ods|odt|ogg|pdf|png|pot|pps|ppt|pptx|ra|ram|svg|svgz|swf|tar|tif|tiff|ttf|ttc|wav|wma|wri|xla|xls|xlsx|xlt|xlw|zip)$ {
    expires 31536000s;
    add_header Pragma "public";
    add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
    add_header X-Powered-By "W3 Total Cache/0.9.2.5b";
}
# END W3TC Browser Cache
# BEGIN W3TC Minify core
rewrite ^/wp-content/w3tc/min/w3tc_rewrite_test$ /wp-content/w3tc/min/index.php?w3tc_rewrite_test=1 last;
set $w3tc_enc "";
if ($http_accept_encoding ~ gzip) {
    set $w3tc_enc .gzip;
}
if (-f $request_filename$w3tc_enc) {
    rewrite (.*) $1$w3tc_enc break;
}
rewrite ^/wp-content/w3tc/min/(.+\.(css|js))$ /wp-content/w3tc/min/index.php?file=$1 last;
# END W3TC Minify core
# BEGIN W3TC Skip 404 error handling by WordPress for static files
if (-f $request_filename) {
    break;
}
if (-d $request_filename) {
    break;
}
if ($request_uri ~ "(robots\.txt|sitemap(_index)?\.xml(\.gz)?|[a-z0-9_\-]+-sitemap([0-9]+)?\.xml(\.gz)?)") {
    break;
}
if ($request_uri ~* \.(css|js|htc|htm|rtf|rtx|svg|svgz|txt|xsd|xsl|xml|asf|asx|wax|wmv|wmx|avi|bmp|class|divx|doc|docx|eot|exe|gif|gz|gzip|ico|jpg|jpeg|jpe|mdb|mid|midi|mov|qt|mp3|m4a|mp4|m4v|mpeg|mpg|mpe|mpp|otf|odb|odc|odf|odg|odp|ods|odt|ogg|pdf|png|pot|pps|ppt|pptx|ra|ram|svg|svgz|swf|tar|tif|tiff|ttf|ttc|wav|wma|wri|xla|xls|xlsx|xlt|xlw|zip)$) {
    return 404;
}
# END W3TC Skip 404 error handling by WordPress for static files

# BEGIN Better WP Security
    location ~ /\.ht {
        deny all;
    }

    location ~ wp-config.php {
        deny all;
    }

    location ~ readme.html {
        deny all;
    }

    location ~ readme.txt {
        deny all;
    }

    location ~ /install.php {
        deny all;
    }

    set $susquery 0;
    set $rule_2 0;
    set $rule_3 0;

    rewrite ^wp-includes/(.*).php /not_found last;
    rewrite ^/wp-admin/includes(.*)$ /not_found last;

    if ($request_method ~* "^(TRACE|DELETE|TRACK)"){
        return 403;
    }

    set $rule_0 0;

    if ($request_method ~ "POST"){
        set $rule_0 1;
    }

    if ($uri ~ "^(.*)wp-comments-post.php*"){
        set $rule_0 2$rule_0;
    }

    if ($http_user_agent ~ "^$"){
        set $rule_0 4$rule_0;
    }

    if ($rule_0 = "421"){
        return 403;
    }

    if ($args ~* "\.\./") {
        set $susquery 1;
    }

    if ($args ~* "boot.ini") {
        set $susquery 1;
    }

    if ($args ~* "tag=") {
        set $susquery 1;
    }

    if ($args ~* "ftp:") {
        set $susquery 1;
    }

    if ($args ~* "http:") {
        set $susquery 1;
    }

    if ($args ~* "https:") {
        set $susquery 1;
    }

    if ($args ~* "(<|%3C).*script.*(>|%3E)") {
        set $susquery 1;
    }

    if ($args ~* "mosConfig_[a-zA-Z_]{1,21}(=|%3D)") {
        set $susquery 1;
    }

    if ($args ~* "base64_encode") {
        set $susquery 1;
    }

    if ($args ~* "(%24&x)") {
        set $susquery 1;
    }

    if ($args ~* "(\[|\]|\(|\)|<|>|ê|\"|;|\?|\*|=$)"){
        set $susquery 1;
    }

    if ($args ~* "(&#x22;|&#x27;|&#x3C;|&#x3E;|&#x5C;|&#x7B;|&#x7C;|%24&x)"){
        set $susquery 1;
    }

    if ($args ~* "(%0|%A|%B|%C|%D|%E|%F|127.0)") {
        set $susquery 1;
    }

    if ($args ~* "(globals|encode|localhost|loopback)") {
        set $susquery 1;
    }

    if ($args ~* "(request|select|insert|concat|union|declare)") {
        set $susquery 1;
    }

    if ($http_cookie !~* "wordpress_logged_in_" ) {
        set $susquery "${susquery}2";
        set $rule_2 1;
        set $rule_3 1;
    }

    if ($susquery = 12) {
        return 403;
    }


# END Better WP Security

/etc/php5/fpm/php-fpm.conf:

pid = /var/run/php5-fpm.pid
error_log = /var/log/php5-fpm.log
emergency_restart_threshold = 3
emergency_restart_interval = 1m
process_control_timeout = 10s
events.mechanism = epoll

/etc/php5/fpm/php.ini (only options i changed):

open_basedir ="/var/www/"
disable_functions = pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,dl,system,shell_exec,fsockopen,parse_ini_file,passthru,popen,proc_open,proc_close,shell_exec,show_source,symlink,proc_close,proc_get_status,proc_nice,proc_open,proc_terminate,shell_exec ,highlight_file,escapeshellcmd,define_syslog_variables,posix_uname,posix_getpwuid,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,escapeshellarg,posix_uname,ftp_exec,ftp_connect,ftp_login,ftp_get,ftp_put,ftp_nb_fput,ftp_raw,ftp_rawlist,ini_alter,ini_restore,inject_code,syslog,openlog,define_syslog_variables,apache_setenv,mysql_pconnect,eval,phpAds_XmlRpc,phpA ds_remoteInfo,phpAds_xmlrpcEncode,phpAds_xmlrpcDecode,xmlrpc_entity_decode,fp,fput,virtual,show_source,pclose,readfile,wget

expose_php = off
max_execution_time = 30
max_input_time = 60
memory_limit = 128M
display_errors = Off
post_max_size = 2M
allow_url_fopen = off
default_socket_timeout = 60

APC settings:

[APC]
apc.enabled = 1
apc.shm_segments = 1
apc.shm_size = 64M
apc.optimization = 0
apc.num_files_hint = 4096
apc.ttl = 60
apc.user_ttl = 7200
apc.gc_ttl = 0
apc.cache_by_default = 1
apc.filters = ""
apc.mmap_file_mask = "/tmp/apc.XXXXXX"
apc.slam_defense = 0
apc.file_update_protection = 2
apc.enable_cli = 0
apc.max_file_size = 10M
apc.stat = 1
apc.write_lock = 1
apc.report_autofilter = 0
apc.include_once_override = 0
apc.localcache = 0
apc.localcache.size = 512
apc.coredump_unmap = 0
apc.stat_ctime = 0

/etc/php5/fpm/pool.d/www.conf

user = www-data
group = www-data
listen = /var/run/php5-fpm.sock
listen.owner = www-data
listen.group = www-data
listen.mode = 0666
pm = ondemand
pm.max_children = 5
pm.process_idle_timeout = 3s;
pm.max_requests = 50

I also started to get 404 errors in front page if i use W3 Total Cache's Page Cache (Disk Enhanced). It worked fine untill somedays ago, and then, out of nowhere, it started to happen. Tonight i will disable my mobile plugin and activate only W3 Total Cache to see if it's a conflict with them...

And to finish all this, i have been getting this error:

PHP Warning:  apc_store(): Unable to allocate memory for pool. in /var/www/wp-content/plugins/w3-total-cache/lib/W3/Cache/Apc.php on line 41

I already modifed my APC settings, but no sucess. So... could anyone help me with those issuees, please?

Ooohh... if it helps, i instaled PHP like this:

sudo apt-get install php5-fpm php5-suhosin php-apc php5-gd php5-imagick php5-curl

And Nginx from the official PPA. Sorry for my bad english and thanks for your time people! (:

I'm setting up my first VPS and it seems to be working well. Installed Nginx, php-fpm (as a unix socket), APC, Varnish and MySQL on Ubuntu 12.04 server with OnApp, and everything works and is damm fast, at least on my end.

Atm i have a VPS with 1 core (Xeon(R) X5660 is what the VPS use iirc), 1.2GHz and 768MB RAM, everything limited with OnApp. Doing an ab test, i got this:

ab -c 10 -n 1000 http://198.136.50.39/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 198.136.50.39 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        
Server Hostname:        198.136.50.39
Server Port:            80

Document Path:          /
Document Length:        6482 bytes

Concurrency Level:      10
Time taken for tests:   41.695 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      6952000 bytes
HTML transferred:       6482000 bytes
Requests per second:    23.98 [#/sec] (mean)
Time per request:       416.946 [ms] (mean)
Time per request:       41.695 [ms] (mean, across all concurrent requests)
Transfer rate:          162.83 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:      167  203  57.3    182     614
Processing:   173  212  82.9    189    2015
Waiting:      169  206  59.8    185     726
Total:        345  415 126.5    373    2419

Percentage of the requests served within a certain time (ms)
  50%    373
  66%    388
  75%    410
  80%    430
  90%    504
  95%    708
  98%    866
  99%    931
 100%   2419 (longest request)

While i did the test i was taking a look at the VPS's stats with htop, and it seems like it did not used more than 230mb RAM in the entire test, and CPU stayed at 2~4% usage, what is prety cool i guess. But it seems like the Requests per second was kinda low. What do you guys think? Does it look ok for the setup i have and i'm being paranoic, or it's bad? With default settings i used loadimpact.com to take a look, with 25 users (default free test) and default load as 130ms... after i started messing up with the settings, did the test again and it jumped to 250ms, so i guess i'm doing something wrong.

I started trying to optimize MySQL for it, using tutoriais i found on the internet for low end boxes and https://tools.percona.com/. Percona gave me some really big numbers, so i did a mix of both.

I also optimized php-fpm and Nginx, reading they wikis and tutorials all over the internet. I will use this VPS for a WordPress website with about 5k daily visitors and 13~15k daily pageviews. W3 Total Cache is setup to do database and object cache using APC, and minify/page cache with disk enhanced... but before i migrate the site to this server and go live with it, i want to optimize everything and be sure it will be fast.

I also use MaxCDN (not active on the VPS atm) and will use CloudFlare as a DNS server. Anyone can help me optimize it, please?

My MySQL config looks like this atm:

[mysqld_safe]
open_files_limit = 8192

[mysqld]
skip_external_locking
skip_slave_start
bind-address        = 127.0.0.1
key_buffer      = 64M
join_buffer_size        = 1M
read_buffer_size        = 1M
sort_buffer_size        = 2M
max_allowed_packet  = 16M
max_connect_errors      = 10
thread_stack        = 192K
myisam-recover         = BACKUP
max_connections        = 400
table_cache            = 1024
thread_cache_size      = 286
interactive_timeout    = 25
wait_timeout           = 1000
query_cache_type    = 1
query_cache_limit   = 1M
query_cache_size        = 32M
max_write_lock_count = 1
expire_logs_days    = 10
max_binlog_size         = 100M

innodb_flush_method            = O_DIRECT
innodb_buffer_pool_size        = 10M

skip_name_resolve
sql_mode                       = STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_AUTO_VALUE_ON_ZERO,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ONLY_FULL_GROUP_BY

tmp_table_size      = 16M
max_heap_table_size = 16M

[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer      = 16M

My Nginx config looks like this:

worker_processes 1;

events {
    worker_connections 1024;
}

http {

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 15;
    types_hash_max_size 2048;
    server_tokens off;

    open_file_cache max=1000 inactive=300s;
    open_file_cache_valid 360s;
    open_file_cache_min_uses 2;
    open_file_cache_errors off;

        client_body_buffer_size 8K;
        client_header_buffer_size 1k;
        client_max_body_size 2m;
        large_client_header_buffers 2 1k;

        client_body_timeout   10;
        client_header_timeout 10;
        send_timeout          10;

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

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

    gzip on;
    gzip_disable "msie6";

    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 9;
    gzip_buffers 16 8k;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

My site's Nginx config looks like this:

server {

    listen 8080;
    server_name www.ubuntubrsc.com ubuntubrsc.com;

    root /var/www;
    index index.php index.html index.htm;
        include /var/www/nginx.conf;

        error_log /var/log/nginx/blog.error_log;

        if ($host ~* ^[^.]+\.[^.]+$) {
        rewrite ^(.*)$ http://www.$host$1 permanent;
        }

    location / {
        try_files $uri $uri/ /index.php;
        }

        location = /favicon.ico {
    log_not_found off;
    access_log off;
        }

        location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
        }

        location ~ /\. {
    deny all;
    access_log off;
    log_not_found off;
        }

        location ~* ^/wp-content/uploads/.*.php$ {
    deny all;
    access_log off;
    log_not_found off;
        }

        rewrite /wp-admin$ $scheme://$host$uri/ permanent;

        location ~ \.(css|js|htc)$ {
        root /var/www/ubuntu-online/;
        expires 31536000s;
        add_header Pragma "public";
        add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
        }
        location ~ \.(html|htm|rtf|rtx|svg|svgz|txt|xsd|xsl|xml)$ {
        root /var/www/ubuntu-online/;
        expires 3600s;
        add_header Pragma "public";
        add_header Cache-Control "max-age=3600, public, must-revalidate, proxy-revalidate";
        }
        location ~ \.(gif|gz|gzip|ico|jpg|jpeg|jpe|swf)$ {
        root /var/www/ubuntu-online/;
        expires 31536000s;
        add_header Pragma "public";
        add_header Cache-Control "max-age=31536000, public, must-revalidate, proxy-revalidate";
        }

    error_page 404 = @wordpress;
    log_not_found off;

    location @wordpress {
        include /etc/nginx/fastcgi_params;      
        fastcgi_pass unix:/var/run/php5-fpm.sock;
            fastcgi_param SCRIPT_NAME /index.php;
            fastcgi_param SCRIPT_FILENAME $document_root/index.php;
        }

    location ~ \.php$ {
                try_files $uri =404;

        include /etc/nginx/fastcgi_params;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        if (-f $request_filename) {
                fastcgi_pass unix:/var/run/php5-fpm.sock;
            }
    }
      }

The cache part for ubuntu-online is because i don't know if W3 Total Cache's settings are avaiable for all folders inside /www/var/, so i added those with "root /var/www/ubuntu-online/" to be sure. Should i erase them?

On php.ini i edited some stuffs to increase security, like open_basedir and other stuffs, and also enabled a php internal cache editing 2 lines, but can't remember what was it.

Also, those are the APC settings:

[APC]
apc.enabled = 1
apc.cache_by_default = 1
apc.stat = 1
apc.shm_segments = 1
apc.shm_size = 64
apc.ttl = 7200

And finaly, my php-fpm pool:

listen = /var/run/php5-fpm.sock
listen.owner = www-data
listen.group = www-data
listen.mode = 0666
pm.max_children = 9
pm.start_servers = 3
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.max_requests = 200

Also, how do i know Varnish is working with WordPress? I know i have to make some specific configs to varnish and WP play well together, and i did follow this https://github.com/nicolargo/varnish-nginx-wordpress, but how do i know it's working?

Thanks in advanced everyone (: