Re: Regarding postgreSQL performance on DRAM

From: Thomas Kellerer <spam_eater(at)gmx(dot)net>
To: pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: Re: Regarding postgreSQL performance on DRAM
Date: 2019-02-20 20:42:22
Message-ID: f37b7ea7-966d-d54a-bf8d-a1c7229e5f8a@gmx.net
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Jerry Sievers schrieb am 20.02.2019 um 21:19:
>> My workload is simple. I  insert 1 million rows into a table with 100
>> columns, where each column is 256 bytes in length, and every 10
>> inserts are batched into a transaction.
>
> Your test workload qualifies for TOASTing due to the $unrealistically
> long physical tuple size.

Hmm. I though TOAST is only applied to single values, not the entire tuple (row)?

As each column is substantially shorter than the TOAST threshold, I would not expect toasting to kick in here.

Or am I missing something?

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