Обсуждение: pgsql: Remove lazy_update_relstats; go back to having VACUUM just record

Log Message:
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Remove lazy_update_relstats; go back to having VACUUM just record the
actual number of unremoved tuples as pg_class.reltuples.  The idea of
trying to estimate a steady state condition still seems attractive, but
this particular implementation crashed and burned ...

Tags:
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REL8_0_STABLE

Modified Files:
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    pgsql/src/backend/commands:
        vacuumlazy.c (r1.50 -> r1.50.4.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/vacuumlazy.c.diff?r1=1.50&r2=1.50.4.1)