Postgresql | Vacuum information - Mailing list pgsql-admin

From Sohel Tamboli
Subject Postgresql | Vacuum information
Date
Msg-id CAAbZosDAyTWrqzEeMwKWYbgEpieTjZuSoYTODyujC=GJK2fqgw@mail.gmail.com
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Responses Re: Postgresql | Vacuum information  ("David G. Johnston" <david.g.johnston@gmail.com>)
List pgsql-admin
Hi, 

I need some information on vacuum in postgresql. I know that "vacuum full" recreate full table and releases space to OS. Only "vacuum" clears the dead tuples and free the space but does not returns free space to OS, indeed it keeps free space as a part of table. 
My question is, after running only "vacuum", how does new data or insert is written to the table? I need to know that Does new data gets inserted in free space available in between of live tuples or gets inserted at the end of table everytime. 

Appreciate your quick response!! 

Thanks, 
Sohel

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