Thread: pgsql: Display explain buffers measurements in memory units rather than

Log Message:
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Display explain buffers measurements in memory units rather than blocks. Also show "Total Buffer Usage" to hint that
theseare totals not averages per loop 

Modified Files:
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    pgsql/src/backend/commands:
        explain.c (r1.200 -> r1.201)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/explain.c?r1=1.200&r2=1.201)