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Re: Improving pg_dump performance when handling large numbers of LOBs - Mailing list pgsql-general

From Wyatt Tellis
Subject Re: Improving pg_dump performance when handling large numbers of LOBs
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Msg-id CANCMp8wRi=v9vrf4HyvX9XHjyoxuu-gM8WRoUNnF+fBdmWGevw@mail.gmail.com
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In response to Re: Improving pg_dump performance when handling large numbers of LOBs  (Ron Johnson <ronljohnsonjr@gmail.com>)
Responses Re: Improving pg_dump performance when handling large numbers of LOBs
Re: Improving pg_dump performance when handling large numbers of LOBs
Re: Improving pg_dump performance when handling large numbers of LOBs
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Yes, the LOBs themselves are tiny, but there are a lot of them (~150 million) which seem to be slowing down pg_dump.  Note, we did not design/build this system and agree that use of LOBs for this purpose was not necessary.

Wyatt

On Mon, Feb 5, 2024 at 11:36 AM Ron Johnson <ronljohnsonjr@gmail.com> wrote:
On Mon, Feb 5, 2024 at 2:01 PM Wyatt Tellis <wyatt.tellis@gmail.com> wrote:
Hi,

We've inherited a series of legacy PG 12 clusters that each contain a database that we need to migrate to a PG 15 cluster. Each database contains about 150 million large objects totaling about 250GB.

250*10^9 / (150*10^6) = 1667 bytes.  That's tiny.

Am I misunderstanding you?

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