PostgreSQL in FreeBSD jails

Alexander Rusinov boot at
Tue Apr 26 12:58:24 PDT 2005

Marc G. Fournier wrote:

> On Tue, 26 Apr 2005, Bill Moran wrote:
>> Alexander Rusinov <boot at> wrote:
>>> Hi,
>>> I need to run a number of PostgreSQL servers in different FreeBSD 
>>> jails.
>>> I managed to run a first instance of PostgreSQL server in a jail, but
>>> after I launch a new server in another jail the first one starts to
>>> return an error messages like the following:
>>> semctl(1507328, 4, SETVAL, 0) failed: Invalid argument
>>> The problem in general is: only one instance of PostgreSQL server
>>> processes clients' connections, all of the others return semctl errors.
>> I had this exact same problem.  I never found a solution.  The cause
>> appears to be that, since shared memory is not segregated between jails,
>> the newly launched Postgres instances corrupt the shared memory of
>> previously running Postgres instances.
> I'm running 9 jails on a server right now, each with their own instance:
> ....
> and never noticed any issues ... but, this is with 4.11, not 5.x, so 
> maybe something has changed?

Can you tell please what version of PostgreSQL are you running?

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