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help / color / mirror / Atom feedFrom: Bharath Rupireddy <[email protected]>
To: Zhihong Yu <[email protected]>
Cc: Luc Vlaming <[email protected]>
Cc: Justin Pryzby <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Paul Guo <[email protected]>
Cc: Jeff Davis <[email protected]>
Subject: Re: New Table Access Methods for Multi and Single Inserts
Date: Sat, 20 Feb 2021 13:20:39 +0530
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On Sat, Feb 20, 2021 at 12:53 PM Zhihong Yu <[email protected]> wrote:
>
> Hi,
> bq. case 3 - 2 integer(of 4 bytes each) columns, tuple size 32 bytes
>
> Is there some other column(s) per row apart from the integer columns ? Since the 2 integer columns only occupy 8 bytes. I wonder where the other 32-8=24 bytes come from.
There are no other columns in the test case. Those 24 bytes are for
tuple header(23bytes) and 1 byte for other bookkeeping info. See
"Table Row Layout" from
https://www.postgresql.org/docs/devel/storage-page-layout.html.
With Regards,
Bharath Rupireddy.
EnterpriseDB: http://www.enterprisedb.com
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Subject: Re: New Table Access Methods for Multi and Single Inserts
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