IIRC, there hasn't been any direct benchmark for it (though I've wanted to do that but had no time), but it's been the olnly real explanation put forward for the behaviour we've seen. And it does make sense given the thread-centric view of the windows mm.
/Magnus > ------- Original Message ------- > From: "Trevor Talbot" <[EMAIL PROTECTED]> > To: pgsql-hackers@postgresql.org > Sent: 07-11-11, 00:31:59 > Subject: [HACKERS] Win32 shared memory speed > > I've seen several comments about shared memory under Windows being > "slow", but I haven't had much luck finding info in the archives. > > What are the details of this? How was it determined and is there a > straightforward test/benchmark? > > ---------------------------(end of broadcast)--------------------------- > TIP 2: Don't 'kill -9' the postmaster > ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
