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Old 11-19-2012, 06:07 PM   #1
thiyagusham
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Registered: Apr 2012
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IPCS in linux


Hi to all;

I interpret Semaphores and Shared Memory Allocations
in linux to oracle 10g Database.

PHP Code:
[root@localhost ~]# cd  /proc/sys/kernel
[root@localhost kernel]# cat sem
250     32000   100     128 
ipcs -s

PHP Code:
root@localhost ~]# ipcs -ls
------ Semaphore Limits --------
max number of arrays 128
max semaphores per 
array = 250
max semaphores system wide 
32000
max ops per semop call 
100
semaphore max value 
32767 
128*250 = 32000
what's the logic behind to get 32000.
I red so many links , make me lot of confusions. could anyone clarify my doubt ?



I need some clear details about Semaphores related to oracle database.

Last edited by thiyagusham; 11-19-2012 at 06:16 PM.
 
Old 11-20-2012, 10:02 AM   #2
TB0ne
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Registered: Jul 2003
Location: Birmingham, Alabama
Distribution: SuSE, RedHat, Slack,CentOS
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Quote:
Originally Posted by thiyagusham View Post
Hi to all;
I interpret Semaphores and Shared Memory Allocations in linux to oracle 10g Database.

128*250 = 32000
what's the logic behind to get 32000. I red so many links , make me lot of confusions. could anyone clarify my doubt ?
I need some clear details about Semaphores related to oracle database.
The best people to ask would be Oracle tech support....since you're paying for Oracle, give them a call. Aside from what's already out on Oracle's knowledegbase regarding this (you DID check there first, right?), there's little else we can tell you. Oracle can tell you why they're using that figure.
 
Old 11-20-2012, 10:57 AM   #3
mandyapenguin
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Registered: Nov 2011
Location: India
Distribution: RedHat, Cent OS, Fedora, Debian, Ubuntu
Posts: 105

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Quote:
128*250 = 32000
what's the logic behind to get 32000.
I red so many links , make me lot of confusions. could anyone clarify my doubt ?
Are you looking for multiplication in command line?
Code:
expr 128 \* 250
 
  


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