postmaster restart on a different dataDir

From: "Medi Montaseri" <montaseri(at)gmail(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Subject: postmaster restart on a different dataDir
Date: 2007-08-13 23:05:37
Message-ID: 8078a1730708131605pd700c76u2bc9e4c96cac5947@mail.gmail.com
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Hi,

I am trying to measure startup time of postmaster. Say I have postmaster
running on -D /tmp/d1 and would like to restart it on -D /tmp/d2.

If I just say
time pg_ctl restart -D /tmp/d2
it will not produce an accurate result because pg_ctl will start postmaster
in the background and return immediately but if you query the engine right
away, you'll see that it is not ready yet as in
time ( pg_ctl restart -D /tmp/d2 ; psql -l )

If I call postmaster, then the command is blocking waiting for postmaster to
exit.
I am sure there is a way...but I figured I ask my good friends first...

Thanks
Medi

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