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Various Ways To Fix Oracle Linux Kernel Tuning

by January 30, 2022

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    Over the past few days, some users have encountered an Oracle Linux kernel configuration error code. This problem occurs for many reasons. Let’s discuss some of them below. The Linux kernel is flexible and you should even be able to change how it works on the fly by dynamically changing some of its parameters thanks to the sysctl command. By using sysctl wisely, you can modify someone’s machine without having to recompile your own kernel and get results as quickly as possible.

    oracle linux kernel tuning

    To display the current kernel parameter values, use:

    What are the critical kernel parameters for Oracle DB?

    The shmall, shmmax, and a shmmni options determine the amount of memory that Oracle owns and can use. These parameters are defined in pages of memory, not bytes, but usingThe sizes used are the note multiplied by the page size, most commonly 4096 bytes.

    If you used the Oracle Database Preinstallation RPM to perform pre-installation configuration tasks, the Oracle Database Preinstallation RPM sets many of these kernel options for you. However, if one has not used the Oracle Database preset RPM, or if the kernel factors deviate from a reasonable minimum value, change the kernel parameter values:

    How do I change kernel Shmmax in Linux?

    Log in as root.Edit the /etc/sysctl. conf. Redhat Linux also allows you and your family to change the sysctl.As you can see, set values ​​for kernel.shmax and kernel.shmall like this: echo MemSize > /proc/sys/shmmax mirror MemSize > /proc/sys/shmall.Restart your PC with this command: sync; synchronize; start again.

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    Settings Command
    semmsl, semmns, semopm and semmni # /sbin/sysctl -a | grep sem

    What is Shmmni Shmall & Shmmax?

    This option specifies the maximum size, containing bytes, of a single shared memory segment that a Linux process is likely to allocate in its virtual memory address space. Binding to allocate an SGA larger than SHMMAX results in the following type of error.

    This command displays the value of the semaphore parameters in the given po OK.
    shmall, shmmax and shmmni # /sbin/sysctl -a | grep shm

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    • This call displays information about the total size of the shared memory segment.