> > Does anyone know how to adjust the IPC settings in Windows?
>
> There aren't any such settings in Windows, AFAIK.
Correct. The only real adjustable limit is the size of the Windows pagefile, but that one is normally dynamic. But there must be room for all the shared memory in it. It's not going to be there, but the space is reserved.
That said, if you need to increase the pagefile size to accomodate your shared buffers, you likely have way too large value for shared buffers.
/Magnus