Oracle集群管理-19C集群禁用numa和大页内存特性-Toy模板网

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Linux Redhat 7.9关闭内存管理特性

1 关闭大页内存

[root@db1 ~]# cat /sys/kernel/mm/transparent_hugepage/defrag

[always] madvise never

[root@db1 ~]# cat /sys/kernel/mm/transparent_hugepage/enabled

[always] madvise never

echo never > /sys/kernel/mm/transparent_hugepage/enabled

echo never > /sys/kernel/mm/transparent_hugepage/defrag

cat /sys/kernel/mm/transparent_hugepage/defrag

cat /sys/kernel/mm/transparent_hugepage/enabled

chmod u+x /etc/rc.d/rc.local (忘记加权限了导致多次重启主机shit)

echo 'echo never > /sys/kernel/mm/transparent_hugepage/defrag' >> /etc/rc.d/rc.local

echo 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' >> /etc/rc.d/rc.local

3.验证是否关闭了透明大页

[root@eomsdb1 ~]# grep Huge /proc/meminfo

AnonHugePages: 83968 kB

HugePages_Total: 0 #success

HugePages_Free: 0

HugePages_Rsvd: 0

HugePages_Surp: 0

Hugepagesize: 2048 kB

[root@eomsdb1 ~]# cat /proc/sys/vm/nr_hugepages

0

#success

2 开启大页内存

echo always > /sys/kernel/mm/transparent_hugepage/enabled

echo always > /sys/kernel/mm/transparent_hugepage/defrag

cat /sys/kernel/mm/transparent_hugepage/defrag

cat /sys/kernel/mm/transparent_hugepage/enabled

3 禁用numa特性

一、检查OS是否开启NUMA

# cat /proc/cmdline
root=LABEL=DBSYS ro bootarea=dbsys rhgb quiet console=ttyS0,115200n8 console=tty1 crashkernel=128M@16M numa=off
# numactl --hardware
dmesg|grep -i numa文章来源地址https://www.toymoban.com/news/detail-704268.html

备份numa文件