Załóżmy, że mamy takie wartości w tabeli:
id liczbaludnosci data kraj
2 1000 2014-01-01 Polska
3 1000 2014-01-01 Ukraina
4 2000 2014-01-01
id liczbaludnosci data kraj
2 1000 2014-01-01 Polska
3 1000 2014-01-01 Ukraina
4 2000 2014-01-01
Wszystko
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Archiwum
Note that even when this parameter (autovacuum - przyp.) is disabled, the system will launch autovacuum processes if necessary to prevent transaction ID wraparound. See Section 23.1.4 for more information.
But since transaction IDs have limited size (32 bits at this writing) a cluster that runs for a long time (more than 4 billion transactions) would suffer transaction ID wraparound: the XID counter wraps around to zero, and all of a sudden transactions that were
CREATE
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PobierzpgAdmin to takie dosyc srednie narzedzie do developingu bazu danych
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http://rob.conery.io/2015/02/24/embracing-sql-in-postgres/
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