Re: Why MarkBufferDirtyHint doesn't increment shared_blks_dirtied

On Mon, Mar 24, 2014 at 9:02 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> MarkBufferDirty() always increment BufferUsage counter
> (shared_blks_dirtied) for dirty blocks whenever it dirties any
> block, whereas same is not true for MarkBufferDirtyHint().
> Is there any particular reason for not incrementing
> shared_blks_dirtied in MarkBufferDirtyHint()?

Hmm, I think that's a bug, dating back to this commit:

commit 2254367435fcc4a31cc3b6d8324e33c5c30f265a
Author: Robert Haas <rhaas(at)postgresql(dot)org>
Date: Wed Feb 22 20:33:05 2012 -0500

Make EXPLAIN (BUFFERS) track blocks dirtied, as well as those written.

Also expose the new counters through pg_stat_statements.

Patch by me. Review by Fujii Masao and Greg Smith.

--
Robert Haas
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