{"id":2113,"date":"2013-06-26T12:25:52","date_gmt":"2013-06-26T04:25:52","guid":{"rendered":"http:\/\/rmohan.com\/?p=2113"},"modified":"2013-06-26T12:25:52","modified_gmt":"2013-06-26T04:25:52","slug":"tuned-on-rhelcentosfedora","status":"publish","type":"post","link":"https:\/\/mohan.sg\/?p=2113","title":{"rendered":"\u201ctuned\u201d on RHEL\/CentOS\/Fedora"},"content":{"rendered":"<p>Starting with RHEL 6 ( and thus also with CentOS 6 ) Red Hat users have possibility to use <strong>tuned<\/strong> tool which gives possibility to activate different tuned profiles for RHEL 6 running server.<\/p>\n<p>So what is tuned? \u2018yum info tuned\u2019 gives below<\/p>\n<p><strong># yum info tuned <\/strong><\/p>\n<p><strong>Description : The tuned package contains a daemon that tunes system settings<br \/>\n: dynamically. It does so by monitoring the usage of several system<br \/>\n: components periodically. Based on that information components will<br \/>\n: then be put into lower or higher power saving modes to adapt to<br \/>\n: the current usage. Currently only ethernet network and ATA<br \/>\n: harddisk devices are implemented.<br \/>\n<\/strong><\/p>\n<p>As description above says,tuned provide daemon to tune system settings dynamically.After installation with<\/p>\n<p><code># yum install tuned<\/code><\/p>\n<p>in \/etc\/tune-profiles you will find 9 different profiles designed for different situations.These profiles are<\/p>\n<p><code>default<br \/>\ndesktop-powersave<br \/>\nenterprise-storage<br \/>\nlaptop-ac-powersave<br \/>\nlaptop-battery-powersave<br \/>\nlatency-performance<br \/>\nserver-powersave<br \/>\nspindown-disk<br \/>\nthroughput-performance<br \/>\n<\/code><\/p>\n<p>Above default profiles are self descriptive,and if you want to use some of these on your server,I think interesting ones would be<\/p>\n<p><code>enterprise-storage<br \/>\nlatency-performance<br \/>\nserver-powersave<br \/>\nthroughput-performance<\/code><\/p>\n<p><strong>enterprise-storage<\/strong> will configure system parameters which will correspond enterprise class storages \u2013 important to mention,it will disable<strong> barriers<\/strong>,so not recommended to use it when storage systems do not have battery which prevent data loss in case of power failure<\/p>\n<p><strong>latency-performance<\/strong> is profile designed to provide minimum ( network stack) latency for server.I will edit and adapt parameters related to tpc\/udp in \/proc\/net,do not expect some great magic to happen when switching from default configuration to <strong>latency-performance<\/strong> profile<\/p>\n<p><strong>server-powersave<\/strong> is designed with power saving in mind,and in my opinion directed to desktops,not sure why name of profile is <strong>server-powersave<\/strong><\/p>\n<p><strong>throughput-performance<\/strong> will do almost same thing as <strong>enterprise-storage<\/strong> but will leave enabled <strong>barriers<\/strong>. Recommended is to use it when storage solution is not equipped with battery which prevents data protection in case of power failure<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Starting with RHEL 6 ( and thus also with CentOS 6 ) Red Hat users have possibility to use tuned tool which gives possibility to activate different tuned profiles for RHEL 6 running server.<\/p>\n<p>So what is tuned? \u2018yum info tuned\u2019 gives below<\/p>\n<p># yum info tuned <\/p>\n<p>Description : The tuned package contains a [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/2113"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2113"}],"version-history":[{"count":2,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/2113\/revisions"}],"predecessor-version":[{"id":2115,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/2113\/revisions\/2115"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}