How to disable transparent hugepages (THP) on Red Hat Enterp
How to disable transparent hugepages (THP) on Red Hat Enterprise Linux 7 $ Solution 已验证 - 已更新2017年六月2日23:54 - English 环境 Red Hat Enterprise Linux 7 transparent hugepages (THP) tuned 问题 How to disable transparent hugepages (THP) on Red Hat Enterprise Linux 7 Disabling transparent hugepages (THP) on Red Hat Enterprise Linux 7 is not taking effect. 决议 Follow the steps below 1.Add the "transparent_hugepage=never" kernel parameter option to the grub2 configuration file. Append or change the "transparent_hugepage=never" kernel parameter on the GRUB_CMDLINE_LINUX option in /etc/default/grub file. Only include the parameter once. vim /etc/default/grub GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap ... transparent_hugepage=never" 2.Rebuild the /boot/grub2/grub.cfg file by running the grub2-mkconfig -o command as follows: Please ensure to take a backup of the existing /boot/grub2/grub.cfg before rebuilding. On BIOS-based machines: ~]# grub2-mkconfig -o /boot/grub2/grub.cfg On UEFI-based machines: ~]# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg 3.Reboot the system and verify option has been added Reboot the system # shutdown -r now Verify the parameter is set correctly # cat /proc/cmdline 正确的,应该含 transparent_hugepage=never If Transparent Huge Pages (THP) is still not disabled,continue and use one of the options below. Option 1: (Recommended) create a customized tuned profile with disabled THP With this resolution we will create a customized version of the currently running profile. The customized version will disable THP. Find out which profile is active,create a copy. In the following example we currently use the throughput-performance profile: # tuned-adm active Current active profile: throughput-performance To create customized profile,create a new directory in /etc/tuned directory with desired profile name. # mkdir /etc/tuned/myprofile-nothp Then create a new tuned.conf file for myprofile-nothp,and insert the new tuning info: # cat /etc/tuned/myprofile-nothp/tuned.conf [main] include= throughput-performance [vm] transparent_hugepages=never Make the script executable: # chmod +x /etc/tuned/myprofile-nothp/tuned.conf Enable myprofile like so: # tuned-adm profile myprofile-nothp This change will immediately take effect and persist reboots. To verify if THP are disabled or not,run below command: # cat /sys/kernel/mm/transparent_hugepage/enabled Option 2: (Alternative) Disable tuned services This resolution will disable the tuned services. # systemctl stop tuned # systemctl disable tuned 或者 # tuned-adm off Now add "transparent_hugepage=never" kernel parameter in grub2 configuration file as explained in steps 1-3 above. Reboot the server for changes to take effect. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |