Erik Jones <erik@xxxxxxxxxx> writes: > Hello, we recently migrated our system from 8.1.x to 8.2 and when > running dumps have noticed an extreme decrease in speed where the dump > is concerned (by more than a factor of 2). That's odd. pg_dump is normally pretty much I/O bound, at least assuming your tables are sizable. The only way it wouldn't be is if you have a datatype with a very slow output converter. Have you looked into exactly which tables are slow to dump and what datatypes they contain? (Running pg_dump with log_min_duration_statement enabled would provide useful data about which steps take a long time, if you're not sure.) regards, tom lane
