--with-wal-segsize in-effective?

Hi All,

I am working with latest source downloaded from postgres org site.
I compiled and installed the source with --with-wal-segsize=2, assuming it
should give me 4MB size xlog files. (As per the documentation it is a power
of 2 value.)

During the compilation the configure script spitted out "checking for WAL
segment size... 2MB" - so something was off - and I could not imagine what
it is. After successful install and creating database, I still got 16MB
files in my pg_xlog directory. That's too bad. I can not seem to be able to
follow.

I thought it time to turn on archive anyway. I got 16MB files in my archive
location!

So what am I doing wrong?

Please help.

-DP.