| From: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
|---|---|
| To: | Jan Wieck <jan(at)wi3ck(dot)info>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Magnus Hagander <magnus(at)hagander(dot)net>, Robins Tharakan <tharakan(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_upgrade failing for 200+ million Large Objects |
| Date: | 2021-03-21 18:18:59 |
| Message-ID: | ee7d96b8-7b0e-bb76-9724-900606efe69a@dunslane.net |
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| Lists: | pgsql-hackers |
On 3/21/21 12:56 PM, Jan Wieck wrote:
> On 3/21/21 7:47 AM, Andrew Dunstan wrote:
>> One possible (probable?) source is the JDBC driver, which currently
>> treats all Blobs (and Clobs, for that matter) as LOs. I'm working on
>> improving that some: <https://github.com/pgjdbc/pgjdbc/pull/2093>
>
> You mean the user is using OID columns pointing to large objects and
> the JDBC driver is mapping those for streaming operations?
>
> Yeah, that would explain a lot.
>
>
>
Probably in most cases the database is designed by Hibernate, and the
front end programmers know nothing at all of Oids or LOs, they just ask
for and get a Blob.
cheers
andrew
--
Andrew Dunstan
EDB: https://www.enterprisedb.com
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