Alexey Klyukin <alexk@commandprompt.com> writes:
> Markus Wanner wrote:
>> I'm currently doing this with imessages as well,
>> which violates the rule that the postmaster may not to touch shared
>> memory. I didn't look into ripping that out, yet. I'm not sure it can be
>> done with the existing signaling of the postmaster.
> In Replicator we avoided the need for postmaster to read/write backend's
> shmem data by using it as a signal forwarder.
You should also look at the current code for communication between
autovac launcher and autovac workers. That seems to be largely a
similar problem, and it's been solved in a way that seems to be
safe enough with respect to the postmaster vs shared memory issue.
regards, tom lane
