tomcat-jdk-大页内存

一：普通大页类型

[root@xx ~]# free -g
             total       used       free     shared    buffers     cached
Mem:            15          7          8          0          0          4
-/+ buffers/cache:          2         12
Swap:           15          0         15

[root@xx ~]#  cat /proc/meminfo | grep Hu
AnonHugePages:   2430976 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB

-----取消透明大页
[root@xx ~]# echo never > /sys/kernel/mm/transparent_hugepage/enabled 
[root@xx ~]# more /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]

----设置大页可用共享内存

[root@xx ~]# more /etc/sysctl.conf 

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736

# Controls the ma