ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device

Upon startup of Linux database get ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device (Doc ID 301830.1)

Issue:
======
ORA-27102: out of memory
Linux-x86_64 Error: 28: No space left on device


Solution:
=========
1. Ask SA to increase "kernel.shmall" in /etc/sysctl.conf

    Formula:
    RAM * 1024 * 1024 * 1024 / page_size

    Ex:-
    RAM = 50GB
    $getconf PAGE_SIZE ==> 4096

    50*1024*1024*1024/4096 = 13107200 ==> kernel.shmall

2. After updating kernel.shmall, ask SA to do "sysctl -p" to activate changes.
3. Start the DB




Note:
====
Kernel values will be set in below files

1. Updating below files doesn't require system reboot.

    /proc/sys/kernel/shmmax
    /proc/sys/kernel/shmall
    /proc/sys/kernel/shmmni

    Usage:  # echo "536870912" > /proc/sys/kernel/shmmax
        # sysctl –p                 ---------> Dynamically reload the parameters.

2. To make the changes permanent, update below file and do system reboot
    /etc/sysctl.conf


OR


Reduce SGA_MAX_SIZE



Other Issue:
===========
Kernel panic - not syncing: Out of memory and no killable processes

Fix:
====
System Out of Memory Due To Incorrect Seting of /etc/sysctl.conf min_free_kbytes (Doc ID 1436855.1)