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Old 11-19-2012, 11:29 AM   #1
thiyagusham
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Registered: Apr 2012
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how kernal values are calculated to ORACLE DATABASE


Hi to all ;

Good Morning to all;

I am from ORACLE DBA area. I need some inormation abt kernal parameters. While installing oracle 10g ,
how kernal values are calculated ?

>> IS there any formula to calculate this >>
For ex : kernel.shmall = 2097152

** In this location "/etc/sysctl.conf" file **

PHP Code:
kernel.shmall 2097152
kernel
.shmmax 2147483648
kernel
.shmmni 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem 250 32000 100 128
fs
.file-max 65536
net
.ipv4.ip_local_port_range 1024 65000
net
.core.rmem_default=262144
net
.core.rmem_max=262144
net
.core.wmem_default=262144
net
.core.wmem_max=262144 
Run the following command to change the current kernel parameters

PHP Code:
  /sbin/sysctl -p

**  "/etc/security/limits.conf"  **

*               
soft    nproc   2047
*               hard    nproc   16384
*               soft    nofile  1024
*               hard    nofile  65536 
Note :-

Quote:
Basically this kind of work linux admins do that. I am from DBA
side. If i learn this things additionally It will be useful to me
!
 
Old 11-20-2012, 10:04 AM   #2
TB0ne
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Quote:
Originally Posted by thiyagusham View Post
Hi to all ;
I am from ORACLE DBA area. I need some inormation abt kernal parameters. While installing oracle 10g, how kernal values are calculated ?

IS there any formula to calculate this For ex : kernel.shmall = 2097152 In this location "/etc/sysctl.conf" file
Basically this kind of work linux admins do that. I am from DBA side. If i learn this things additionally It will be useful to me
You have the commands to set it, and know which files to change. From a Linux admin side, that's all you do. If you're wanting to know WHY Oracle needs those values, this (along with your other thread), are covered in the Oracle knowledgebase, which (since you're paying for Oracle), you have access to, along with their tech support. Either can explain things to you.
 
  


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