本篇内容介绍了“Linux中Huge Pages的相关设置有哪些”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
PostgreSQL通过参数huge_pages设置是否启用大页,利用常驻内存用以提升性能
Check if CPU supports HugePages 2MB Size
命令如下,关键字是pse(Page Size Extension)
[root@localhost ~]# cat /proc/cpuinfo | grep pse | uniq flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm fsgsbase smep arat [root@localhost ~]# [root@localhost ~]#cat /proc/cpuinfo | egrep -o pse | head -n 1 pse [root@localhost ~]#
Check if CPU supports HugePages 1GB Size
命令如下,关键字是pdpe1gb
[root@localhost ~]# grep pdpe1gb /proc/cpuinfo | head -n 1 flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm fsgsbase smep arat [root@localhost ~]# [root@localhost ~]# egrep -o pdpe1gb /proc/cpuinfo | head -n 1 pdpe1gb [root@localhost ~]#
How to change default HugePage size?
默认大小为2MB
[root@localhost ~]# grep Hugepagesize: /proc/meminfo Hugepagesize: 2048 kB [root@localhost ~]#
修改命令为
[root@localhost ~]# grep GRUB_CMDLINE_LINUX /etc/sysconfig/grub GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet" [root@localhost ~]# [root@localhost ~]# vim /etc/sysconfig/grub [root@localhost ~]# grep GRUB_CMDLINE_LINUX /etc/sysconfig/grub GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet default_hugepagesz=1G" [root@localhost ~]# [root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.2.14-1.el7.elrepo.x86_64 Found initrd image: /boot/initramfs-5.2.14-1.el7.elrepo.x86_64.img Found linux image: /boot/vmlinuz-3.10.0-957.27.2.el7.x86_64 Found initrd image: /boot/initramfs-3.10.0-957.27.2.el7.x86_64.img Found linux image: /boot/vmlinuz-3.10.0-693.el7.x86_64 Found initrd image: /boot/initramfs-3.10.0-693.el7.x86_64.img Found linux image: /boot/vmlinuz-0-rescue-f0b4bffdc9e44816abd201320f8a4f75 Found initrd image: /boot/initramfs-0-rescue-f0b4bffdc9e44816abd201320f8a4f75.img done [root@localhost ~]# [root@localhost ~]# reboot Connection closed by foreign host. [root@localhost ~]# grep Hugepagesize /proc/meminfo Hugepagesize: 1048576 kB [root@localhost ~]#
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