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Alex. S.
Asked: 2009-05-20 21:12:47 +0800 CST

how to set the shmmax parameter on mac os x

  • 772

how should I set the shm* values in Mac Os X 10.5.6 Leopard in a persistent manner?

mac shmmax

3 Answers

  1. Best Answer

    put this 

    kern.sysv.shmmax=524288000
kern.sysv.shmmin=1
kern.sysv.shmmni=64
kern.sysv.shmseg=16
kern.sysv.semmns=130
kern.sysv.shmall=131072000
kern.sysv.maxproc=2048
kern.maxprocperuid=512

    on this file /etc/sysctl.conf

    and then reboot.

    to verify run this command 

     sysctl kern.sysv.shmmax

    and it should give 524288000

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  2. (from: http://willbryant.net/software/mac_os_x/postgres_initdb_fatal_shared_memory_error_on_leopard)

    One wat to fix it is to run:

    sudo sysctl -w kern.sysv.shmall=65536
sudo sysctl -w kern.sysv.shmmax=16777216

    and then run the initdb command. To persist the changes you need to edit/create the file /etc/sysctl.conf with this:

    kern.sysv.shmall=65536
kern.sysv.shmmax=16777216
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  3. What do you get when you run 'sysctl -p' ? does it load your settings from /etc/sysctl.conf? What file is listed as default when you do 'sysctl --help' ?

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