pg_dump question

Laurette Cisneros wrote:

We use pg_dump nightly to dump data from all tables in our databases (only
table data, makes restore easier, trust me on that).

My question is this:

I have many tables that have millions of rows.

Let's say I start the pg_dump...

Then, an update in a transaction occurs that updates 3 different tables
over a period of time.

Will some of the pg_dump table data be "out of sync"?

How exactly does pg_dump (if at all) handle transactions/table changes?

Pg_dump takes a snapshot of the database when it starts to the restore
will be constistent with the start time of pg_dump. Good question.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

This is most execellent!

On Fri, 18 Jan 2002, Bruce Momjian wrote:

Laurette Cisneros wrote:

We use pg_dump nightly to dump data from all tables in our databases (only
table data, makes restore easier, trust me on that).

My question is this:

I have many tables that have millions of rows.

Let's say I start the pg_dump...

Then, an update in a transaction occurs that updates 3 different tables
over a period of time.

Will some of the pg_dump table data be "out of sync"?

How exactly does pg_dump (if at all) handle transactions/table changes?

Pg_dump takes a snapshot of the database when it starts to the restore
will be constistent with the start time of pg_dump. Good question.

--
Laurette Cisneros
(510) 420-3137
NextBus Information Systems, Inc.
www.nextbus.com
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