On Wed, 12 Feb 2003, Curt Sampson wrote: > On Tue, 11 Feb 2003, Tom Lane wrote: > > > It's a lot too conservative. I've been thinking for awhile that we > > should adjust the defaults. > > Some of these issues could be made to Just Go Away with some code > changes. For example, using mmap rather than SysV shared memory > would automatically optimize your memory usage, and get rid of the > double-buffering problem as well. If we could find a way to avoid using > semephores proportional to the number of connections we have, then you > wouldn't have to worry about that configuration parameter, either. > > In fact, some of this stuff might well improve our portability, too. > For example, mmap is a POSIX standard, whereas shmget is only an X/Open > standard. That makes me suspect that mmap is more widely available on > non-Unix platforms. (But I could be wrong.)
I'll vote for mmap. I use the mm libs with apache/openldap/authldap and it is very fast and pretty common nowadays. It seems quite stable as well. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
