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Re: DB Files

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On 11/15/24 06:27, Andy Hartman wrote:
I created a  new table (V16) and then used SimplySql to take data from mssql to the new Postgres table. The table is 212gig in size. Myquestion comes from the files created on the OS(Windows2022 server) I can see lots of files with the last being:

2474695.143

They are all 1,048,576kb

Is this normal behaviour and could I have done something to use fewer files and larger ones?

Read:

https://www.postgresql.org/docs/current/storage-file-layout.html

[...]

"When a table or index exceeds 1 GB, it is divided into gigabyte-sized segments. The first segment's file name is the same as the filenode; subsequent segments are named filenode.1, filenode.2, etc. This arrangement avoids problems on platforms that have file size limitations. (Actually, 1 GB is just the default segment size. The segment size can be adjusted using the configuration option --with-segsize when building PostgreSQL.) In principle, free space map and visibility map forks could require multiple segments as well, though this is unlikely to happen in practice."

[...]



This table is created in a separate tablespace on a dedicated drive on the windows file system.

  I'm just getting involved in this PostgreSql instance

THanks.

--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx






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