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Re: Need help with phys backed shm segments (Postgresql+FreeBSD). - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Need help with phys backed shm segments (Postgresql+FreeBSD).
Date
Msg-id 14710.976032752@sss.pgh.pa.us
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In response to Re: Need help with phys backed shm segments (Postgresql+FreeBSD).  (Alfred Perlstein <bright@wintelcom.net>)
Responses Re: Need help with phys backed shm segments (Postgresql+FreeBSD).  (Alfred Perlstein <bright@wintelcom.net>)
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BTW, I just remembered that in 7.0.*, the SLocks that are managed by
SpinAcquire() all live in their own little shm segment.  On a machine
where slock_t is char, it'd likely only amount to 128 bytes or so.
Maybe you are seeing some bug in FreeBSD's handling of tiny shm
segments?
        regards, tom lane

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