| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | girish R G peetle <giri(dot)anamika0(at)gmail(dot)com> |
| Cc: | Eduardo Morras <emorrasg(at)yahoo(dot)es>, pgsql-admin <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: PostgreSQL Dump rate is too slow |
| Date: | 2015-01-15 17:41:45 |
| Message-ID: | 54B7FBD9.7080404@commandprompt.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin |
On 01/15/2015 09:21 AM, girish R G peetle wrote:
> Hi all,
> We tried pg_dump with compression level set to zero on 1TB database.
> Dump data rate started with 250GB/hr and gradually dropped to 30 GB/hr
> with 2 hours time span. We might see this behavior on standby server
> too, which will be undesirable.
>
> Any explanation on why we see this behavior ?
Because you have a long running transaction that is causing bloat to
pile up. Using pg_dump on a production database that size is a
non-starter. You need a warm/hot standby or snapshot to do this properly.
JD
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