SHMMAX in kernel config

From: Charles Sprickman (spork_at_inch.com)
Date: 03/30/04

  • Next message: Marc Spitzer: "Re: Security related questions" 
    Date: Mon, 29 Mar 2004 17:26:22 -0500 (EST)
To: freebsd-stable@freebsd.org

    Howdy,

    I recently upgraded an old box running 4.6.2 to 4.9-p4, and found that
    afterwords, Postgres was hanging due to kern.ipc.shmmax being way too low
    (4096 bytes, or one page).

    The line in the kernel config (as confirmed by LINT) was this:

    options SHMMAXPGS=8192 # max amount of shared memory pages (4k)
    options SHMALL="(SHMMAXPGS*PAGE_SIZE+1)"
    options SHMMAX="(SHMMAXPGS*PAGE_SIZE+1)"

    Thinking perhaps this was no longer valid, I tried again by doing the math
    myself, but I got the same result; kern.ipc.shmmax=4096.

    For now I'm just setting this in sysctl.conf, but I'm curious as to what
    has changed, or what I'm doing wrong.

    Thanks,

    Charles 

    --
Charles Sprickman
spork@inch.com
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  • Next message: Marc Spitzer: "Re: Security related questions"