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To enhance perfomance, I'd recommend you to enable large page on
your OS (root account is required).
A) Linux
x86 32bit ... (number of core) * 4 pages
x86 64bit ... (number of core) * 8 pages
POWER 32/64bit ... (number of core) * 1 pages
If you want to allocate 64 large pages,
$shell> echo 0 > /pros/sys/vm/nr_hugepages # need to be reset
$shell> echo 65 > /pros/sys/vm/nr_hugepages # add 1 extra page
$shell> echo 3355443200 > /pros/sys/kernel/shmmax # just large number
$shell> echo 3355443200 > /pros/sys/kernel/shmall
Also may add a few lines into /etc/security/limits.conf file.
* hard memlock unlimited
* soft memlock unlimited
Then restart sshd (/etc/init.d/sshd restart).
B) Solaris
You don't have to set up.
C) Windows (Windows Server 2003 or later, XP 64bit)
You have to assign memory lock operation to your account.
Control Panel -> Administrative Tools -> Local Security Policy ->
Local Policies -> User Rights Assignment -> Lock pages in memory
Ask your administrator
E) Tru64 UNIX
Assign shared memory at boot time.
F) Other aarchitecture which doesn't have Large TLB enhancement
If you have root permission, please install device driver which
located in drivers/mapper.
$shell> cd drivers/mapper
$shell> make
$shell> insmod mapper.ko
$shell> ./device_setup
Then enable DEVICEDRIVER_ALLOCATION = 1 in Makefile.rule.
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