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INSERT IGNORE INTO rss_posts (post_author, post_date, post_date_gmt, post_content, post_content_filtered, post_title, post_excerpt, post_status, post_type, comment_status, ping_status, post_password, post_name, to_ping, pinged, post_modified, post_modified_gmt, post_parent, menu_order, post_mime_type) VALUES ('2', '2009-01-05 04:00:05', '2009-01-04 20:00:05', 'When you get to the level where you start needing VPS’ (Virtual Private Servers) it’s important to understand how they work & how you can get the most out of them. Poorly set up servers can cause you all sorts of problems like Downtime, Slow MYSQL or not withstanding the <a href=\"http://www.earnersblog.com/digproof-your-wordpress/\">force of something like Digg</a>. This article will cover everything you need to do to ensure that your VPS is performing as fast as possible, which mostly focuses on optimizing your memory usage. Please ensure you make backups of your existing my.cnf & httpd.conf we will not be held responsible for any problems. What you will need to action this guide: <ol> <li>Your server specs (most importantly Guaranteed RAM & Burst RAM)</li> <li>Access to your Web Host Support for installation of</li> <li>Root access to your VPS via SSH</li> <li>FTP Access to your server</li> <li>A brief knowledge of an editior (i.e. VI) if not I’ll provide the commands you need to know</li> <li>How to restart mysql & apache in your server operating environment</li> <li>Access to WHM</li> </ol> Viewing your PHPinfo Create a file called phpinfo.php & include the follow in it: [coolcode]<?php phpinfo(); ?>[/coolcode] Navigate to that file on your server i.e. http://www.yourserver.com/phpinfo.php, you should see something like this: <img src=\"http://www.earnersblog.com/wp-content/uploads/2008/12/phpinfo.png\" alt=\"PHPInfo\" width=\"420\" height=\"516\" /> What you need to ask your host to do: <ol> <li>Ensure that you have the <a title=\"PHP Version\" href=\"http://www.php.net/downloads.php\">latest PHP version</a> (currently 5.28)</li> <li>Make sure that PHP is compiled with the latest version of <a title=\"Zend Optimizer\" href=\"http://www.zend.com/en/downloads/\">Zend Optimizer</a>, <a title=\"Eaccelerator\" href=\"http://eaccelerator.net/\">Eaccelerator</a> & <a title=\"ioncube Accelerator\" href=\"http://www.php-accelerator.co.uk/\">Ioncube Accelerator</a>.</li> <li>Ensure that you have the <a title=\"Download Latest Apache Version\" href=\"http://httpd.apache.org/download.cgi\">latest apache version</a> (currently 2.0.63)</li> </ol> Viewing your current resource usage Log in via SSH, I normally use the <a title=\"Putty Client\" href=\"http://www.chiark.greenend.org.uk/~sgtatham/putty/\">Putty client</a> for this. Commands: top: your current server load & resource usage. ps aux: all your processes & which ones are using the most memory/cpu free -m: allocated memory, usage & free memory <img src=\"http://www.earnersblog.com/wp-content/uploads/2008/12/mytop.png\" alt=\"Top Command SSH\" width=\"420\" height=\"209\" /> If you use the top command you can get an overview of the load on the server & memory usage. You can see in the screenshot above my VPS has a load of 0.02 during the last 1minute, 5 minutes & 10 minutes. No-one really knows what the ideal “load average” should be but my general rule is that anything over below 1 is good & above 1 is average. Above 3 & you may start to notice performance issues. With memory usage you should ideally have 100MB or so free (if not more), you really need that buffer for large traffic spikes. If you’re coming close to your allocated memory usage then any allocated burst ram will kick in. On my server I have no burst ram, just guaranteed which means I don’t have that buffer, but my system is more stable (as everyone on the VPS can make use of the burst ram). Removing & Tweaking Unnecessary Services There’s a number of services that you can remove or tweak to increase performance. To remove any of these services log into WHM & go to Service Configuration > Service Manager or Cpanel > Plugins in the left menu. Clamd: This is a virus scanning service, it uses up a ton of memory do generally I’ll remove it. Entropy Chat: Disable this. Spamd: This uses a lot of processes & memory. You shouldn’t remove this, instead we can tweak it. Go to Cpanel > Plugins & install spamdconf, once done go to the bottom of WHM & click on Setup Spamd Startup Configuration. Change the maximum children to 1 or 2. This will stop spamd spawning too many child processes. Cpanel Tweak Settings In WHM under Server Configuration > Tweak Settings: <ol> <li>Make sure default catch-all mail address is set to FAIL, this will use the least CPU time.</li> <li>Untick Mailman, this is a resource hog.</li> <li>Change the number of minutes between mail server queues to 180</li> <li>Uncheck Analog Stats, I also usually uncheck Webalizer.</li> <li>Make sure you tick delete each domains access logs after run, otherwise you’ll start using heaps of Disk Space.</li> </ol> Mysql Optimisation You can edit your mysql configuration (/etc/my.cnf) by typing vi /etc/my.cnf In order to add something in vi you need to hit insert, once completed hit esc then :wq to save & quit. If you want to save without quitting type :q! There’s a few important variables that we’re going to tweak: <ol> <li>max_connections</li> <li> wait_timeout</li> <li> thread_cache_size</li> <li> table_cache</li> <li>key_buffer_size</li> <li>query_cache_size</li> <li>tmp_table_size</li> </ol> Via ssh you can type ‘mysqladmin variables’ to see their current values & you can also see a refreshed processlist by using the command ‘mysqladmin –i10 processlist extended-status’. The settings below should work well for a server with 512MB Guaranteed RAM (also leaving you enough free for traffic spikes), if you have burstable then you can probably look at increasing the number of max_connections to 400 & possibly the key_buffer to 64M: [coolcode] [mysqld] max_connections = 300 key_buffer = 32M myisam_sort_buffer_size = 32M join_buffer_size = 1M read_buffer_size = 1M sort_buffer_size = 2M table_cache = 4000 thread_cache_size = 286 interactive_timeout = 25 wait_timeout = 7000 connect_timeout = 10 max_allowed_packet = 16M max_connect_errors = 10 query_cache_limit = 2M query_cache_size = 12M query_cache_type = 1 tmp_table_size = 16M skip-innodb [mysqld_safe] open_files_limit = 8192 [mysqldump] quick max_allowed_packet = 16M [myisamchk] key_buffer = 64M sort_buffer = 64M read_buffer = 16M write_buffer = 16M [mysqlhotcopy] interactive-timeout[/coolcode] Apache Optimisation Apache settings are located in httpd.conf, you can use ‘locate httpd.conf’ or ‘whereis httpd.conf’ to find it. Optimal settings for apache should look something like this, I like to keep the min & start servers slightly lower to stop too many child processes spawning & using memory: [coolcode] KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 1 MinSpareServers 5 MaxSpareServers 10 StartServers 5 MaxClients 150 MaxRequestsPerChild 1000[/coolcode] Restarting Mysql & Apache Once you’re done you’ll want to restart mysql & apache. You can do this via the command line or via WHM. Restart Mysql: /etc/init.d/mysql restart (if mysql doesn’t restart consider commenting out skip-innodb in my.cnf) Restart Apache: /etc/init.d/httpd restart These commands may vary depending on what your server is running. Monitoring Changes Use the ‘top’ command, ‘free - m’ & ‘ps aux’ to get an idea of how the server is responding. Pay attention to how much RAM you have left & also how much CPU Mysql & Apache is using. You may need to leave Mysql running for 24-48 hours to get a true picture here. Thinking about upgrading to a VPS but not sure who to choose, let us help you with our <a href=\"http://www.earnersblog.com/hosts/list/vps-hosting/\">VPS Web Hosting Reviews</a>, tailored specifically for Affiliate Marketers. [coolcode]top - 19:56:30 up 27 days, 4:11, 1 user, load average: 0.04, 0.07, 0.09 Mem: 524288k total, 386432k used, 137856k free, 0k buffers[/coolcode] --- Related Articles at Affiliate Marketing Blog | Making Money Online is Easy - Earners Blog:<ul><li><a href=\"http://www.earnersblog.com/seobook/\" rel=\"bookmark\" title=\"Seo Book Review, Search Engine Optimization Book\">Seo Book Review, Search Engine Optimization Book</a></li><li><a href=\"http://www.earnersblog.com/flickr/\" rel=\"bookmark\" title=\"Link Building Guide Part 6 - Flickr\">Link Building Guide Part 6 - Flickr</a></li><li><a href=\"http://www.earnersblog.com/yahoo-site-explorer/\" rel=\"bookmark\" title=\"Link Building Guide Part 1 - Thank You Mr Yahoo\">Link Building Guide Part 1 - Thank You Mr Yahoo</a></li><li><a href=\"http://www.earnersblog.com/advertising-special/\" rel=\"bookmark\" title=\"Advertising Update & New Services Launching Soon\">Advertising Update & New Services Launching Soon</a></li><li><a href=\"http://www.earnersblog.com/ebay-ditches-commission-junction/\" rel=\"bookmark\" title=\"Ebay ditches Commission Junction\">Ebay ditches Commission Junction</a></li></ul> <a href=\"http://feedads.googleadservices.com/~a/nunmASWAlZ1_XvJPT405XK8P4do/a\"><img src=\"http://feedads.googleadservices.com/~a/nunmASWAlZ1_XvJPT405XK8P4do/i\" border=\"0\"></img></a><div> <a href=\"http://feedproxy.google.com/~f/EarnersBlog?a=wUuFPKe0\"><img src=\"http://feedproxy.google.com/~f/EarnersBlog?i=wUuFPKe0\" border=\"0\"></img></a> <a href=\"http://feedproxy.google.com/~f/EarnersBlog?a=2UfoVg1a\"><img src=\"http://feedproxy.google.com/~f/EarnersBlog?d=1266\" border=\"0\"></img></a> <a href=\"http://feedproxy.google.com/~f/EarnersBlog?a=dcQgr7jA\"><img src=\"http://feedproxy.google.com/~f/EarnersBlog?d=50\" border=\"0\"></img></a> <a href=\"http://feedproxy.google.com/~f/EarnersBlog?a=6kT8wdiX\"><img src=\"http://feedproxy.google.com/~f/EarnersBlog?i=6kT8wdiX\" border=\"0\"></img></a> <a href=\"http://feedproxy.google.com/~f/EarnersBlog?a=6yUlqsOk\"><img src=\"http://feedproxy.google.com/~f/EarnersBlog?d=1267\" border=\"0\"></img></a> </div>', '', 'VPS Optimization Guide', 'When you get to the level where you start needing VPS’ (Virtual Private Servers) it’s important to understand how they work & how you can get the most out of them...', 'publish', 'post', 'closed', 'closed', '', 'vps-optimization-guide', '', '', '2009-01-05 04:00:05', '2009-01-04 20:00:05', '0', '0', '')

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