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

Robert Haas <rhaas@postgresql.org>

Commit: 2254367435fcc4a31cc3b6d8324e33c5c30f265a
Author: Robert Haas <rhaas@postgresql.org>
Date: 2012-02-23T01:33:05Z
Releases: 9.2.0
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.

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