Re: pg_dump slower than pg_restore

David Wall <d(dot)wall(at)computer(dot)org> writes:
> On 7/4/2014 7:19 AM, Tom Lane wrote:
>> You haven't given us much info about the contents of this database.
>> Are there a lot of tables? functions? large objects? How many is
>> "a lot", if so?

> There are only 32 table, no functions, but mostly large objects. Not
> sure how to know about the LOs, but a quick check from the table sizes I
> estimate at only 2GB, so 16GB could be LOs. There are 7,528,803 entries
> in pg_catalog.pg_largeobject.

Hmm ... how many rows in pg_largeobject_metadata?

> Basic top stats while running show:

> 7547 esignfor 30 10 1148m 1.0g 852 S 2.3 26.9 14:10.27 pg_dump
> --format=c --oids ibc01

That's a pretty large resident size for pg_dump :-( ... you evidently
have a lot of objects of some sort, and I'm betting it's LOs, but
let's make sure.

regards, tom lane