pgsql: pg_upgrade: dramatically reduce memory consumption

pg_upgrade: dramatically reduce memory consumption

Report from Jeff Janes

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/2a2e40aaaad6d9d8a2c6a61817542a2d8c369935

Modified Files
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contrib/pg_upgrade/check.c | 14 ++++----
contrib/pg_upgrade/info.c | 70 ++++++++++++++++++++++++++++-----------
contrib/pg_upgrade/pg_upgrade.h | 16 +++++----
3 files changed, 66 insertions(+), 34 deletions(-)

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