{"id":2201,"date":"2019-08-11T15:14:55","date_gmt":"2019-08-11T13:14:55","guid":{"rendered":"http:\/\/clemente.pamplona.name\/dba\/?p=2201"},"modified":"2025-06-17T10:52:46","modified_gmt":"2025-06-17T08:52:46","slug":"trabajando-con-huge-pages","status":"publish","type":"post","link":"http:\/\/clemente.pamplona.name\/dba\/trabajando-con-huge-pages\/","title":{"rendered":"Trabajando con Huge pages"},"content":{"rendered":"<p>A partir de OEL7 deberiammos de chekquear las transparent huge pages <\/p>\n<pre>\r\ncat \/sys\/kernel\/mm\/transparent_hugepage\/enabled\r\nalways madvise [never]\r\n<\/pre>\n<p>Igualmente , deberiamos de tenerlo configurado en el grub <\/p>\n<pre>\r\nsudo cat \/boot\/grub2\/grub.cfg |grep trans\r\n  set kernelopts=\"root=\/dev\/mapper\/vg_main-lv_root ro console=tty0 no_timer_check biosdevname=0 rd.lvm.lv=vg_main\/lv_root net.ifnames=0 transparent_hugepage=never \"\r\n<\/pre>\n<p>Por el contrario, si no las hemos modificado ( situacion no deseada) , aparecera <\/p>\n<pre>\r\ncat \/sys\/kernel\/mm\/transparent_hugepage\/enabled\r\n[always] madvise never \r\n<\/pre>\n<p>A partir de ahi, para ver las disponibles solo hay que ejecutar <\/p>\n<pre>\r\ntest1$: grep Huge \/proc\/meminfo\r\nAnonHugePages:    897024 kB\r\nHugePages_Total:     220\r\nHugePages_Free:      220\r\nHugePages_Rsvd:        0\r\nHugePages_Surp:        0\r\nHugepagesize:       2048 kB\r\n<\/pre>\n<p>Esto nos indica que teemos 220 paginas de 2048 Kb<br \/>\nLo que significa que el espacio dedicado sera<\/p>\n<p>Gb = 220*2048\/1024\/1024<\/p>\n<p>Mas informacion en :<\/p>\n<ul>\n<li><a href=\"https:\/\/support.oracle.com\/epmos\/faces\/DocContentDisplay?_afrLoop=119005012379589&#038;id=1557478.1&#038;_afrWindowMode=0&#038;_adf.ctrl-state=xcpyr3nku_33\">ALERT: Disable Transparent HugePages on SLES11, RHEL6, RHEL7, RHEL8, OL6, OL7, OL8 and UEK2 and above (Doc ID 1557478.1)<\/>\n<li><a href=\"https:\/\/support.oracle.com\/epmos\/faces\/DocumentDisplay?_afrLoop=119048111044800&#038;parent=DOCUMENT&#038;sourceId=1557478.1&#038;id=2066217.1&#038;_afrWindowMode=0&#038;_adf.ctrl-state=xcpyr3nku_70\">Oracle Linux 7 &#038; 8: How to Disable Transparent HugePages ? (Doc ID 2066217.1)<\/a>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A partir de OEL7 deberiammos de chekquear las transparent huge pages cat \/sys\/kernel\/mm\/transparent_hugepage\/enabled always madvise [never] Igualmente , deberiamos de tenerlo configurado en el grub sudo cat \/boot\/grub2\/grub.cfg |grep trans set kernelopts=\u00bbroot=\/dev\/mapper\/vg_main-lv_root ro console=tty0 no_timer_check biosdevname=0 rd.lvm.lv=vg_main\/lv_root net.ifnames=0 transparent_hugepage=never \u00bb &hellip; <a href=\"http:\/\/clemente.pamplona.name\/dba\/trabajando-con-huge-pages\/\">Sigue leyendo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[567,921,975,8],"tags":[999,1000,1001,1002,1049,1048],"class_list":["post-2201","post","type-post","status-publish","format-standard","hentry","category-12c-en","category-18c","category-19c","category-parametrizacion","tag-huge","tag-huge-pages","tag-pages","tag-performance","tag-transparent","tag-transparent_hugepage"],"_links":{"self":[{"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/posts\/2201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/comments?post=2201"}],"version-history":[{"count":6,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/posts\/2201\/revisions"}],"predecessor-version":[{"id":2402,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/posts\/2201\/revisions\/2402"}],"wp:attachment":[{"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/media?parent=2201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/categories?post=2201"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/clemente.pamplona.name\/dba\/wp-json\/wp\/v2\/tags?post=2201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}