title: Oracle 11gR2 Installation on Oracle linux 7 - Prerequisite condition failed for OS kernel parameter “semmni”
body: <p>while Installing oracle 11gr2 on oracle Linux 7. The prerequisite condition to test whether the OS kernel parameter "semmni" is failed with below error.<a href="https://i.stack.imgur.com/dwTtf.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dwTtf.jpg" alt="enter image description here"></a>
  Please find the screenshot of it.</p>
  
  <p>Below is the kernel parameters which are configured in the etc/sysctl.conf file. </p>
  
  <pre><code>fs.aio-max-nr = 1048576    
  fs.file-max = 6815744    
  kernel.shmall = 2097152    
  kernel.shmmax = 2147483648     
  kernel.shmmni = 4096
  #semaphores: semmsl, semmns, semopm, semmni
  kernel.sem = 250 256000 100 1024    
  net.ipv4.ip_local_port_range = 9000 65500    
  net.core.rmem_default=262144    
  net.core.rmem_max=4194304   
  net.core.wmem_default=262144
  net.core.wmem_max=1048586
  </code></pre>
  
  <p>Any idea why it is failing?</p>