Tom Lane wrote:
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
Well, all of our tables use pretty basic data types: integer (various
sizes), text, varchar, boolean, and timestamps without time zone. In
addition, other than not having a lot of our foreign keys in place,
there have been no other schema changes since the migration.
--
erik jones <erik@xxxxxxxxxx>
software development
emma(r)
