Horton

Re: EXPLAIN BUFFERS

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp>
Cc: Robert Haas <robertmhaas@gmail.com>, Euler Taveira de Oliveira <euler@timbira.com>, Greg Smith <greg@2ndquadrant.com>, Alvaro Herrera <alvherre@commandprompt.com>, Jeff Janes <jeff.janes@gmail.com>, Pgsql Hackers <pgsql-hackers@postgresql.org>
Date: 2009-12-14T03:15:15Z
Lists: pgsql-hackers 
Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp> writes:
> Should I add countBufferUsage boolean arguments to all places
> doInstrument booleans are currently used? This requires several
> minor modifications of codes in many places.

Pushing extra arguments around would create overhead of its own ...
overhead that would be paid even when not using EXPLAIN at all.

			regards, tom lane