關於Sybase RS disable CPU on Solaris/Linux

1.關於Solaris offline CPU Thread, 
提供如下所述方式, 若目前

2 socket, 每個socket有8 core, 每個core有8 個thread,

但僅想讓DB使用一個socket的license

可以把指令放在/etc/rc2.d的某一支script下, 例如S25psradm

#!/bin/sh psradm -f 64-127

設定完畢後重開機, 並驗證:

psrinfo

Ref:

https://community.oracle.com/thread/2423400?tstart=0

http://www.tek-tips.com/viewthread.cfm?qid=1183052

2.針對Linux環境原來也可以offline CPU processor
ref:  http://linuxnewgen.blogspot.tw/2010/12/enable-and-disable-cpu-in-rhel.html

enable and disable CPU in RHEL

Release:

RedHat Enterprise Linux Server 5

Problem:

Need to disable and enable the processor

Solution:

1) To disable the cpu use the below command

# echo 0 > /sys/devices/system/cpu/cpuX/online

Note: Here X indicates the cpu number

2) To enable the cpu use the below command

# echo 1 > /sys/devices/system/cpu/cpuX/online

3) To  check the number of cpu in a server use the below command

# grep "processor" /proc/cpuinfo | wc -l

1.寫一個檔案/etc/init.d/dis_cpu
把script放到init.d 成為service :  

# chkconfig: 345 99 01
#! /bin/sh
case "$1" in
      start)
      echo 0 > /sys/devices/system/cpu/cpu1/online
      cat /proc/cpuinfo |grep processor
      ;;
     stop)
     echo "re-enable cpu processors"
     echo 1 > /sys/devices/system/cpu/cpu1/online
     cat /proc/cpuinfo |grep processor
     ;;
esac
exit 0

2.新增dis_cpu 成為 service
chkconfig --add dis_cpu

3.reboot後, 使用指令check
cat /proc/cpuinfo |grep processor