Обсуждение: Need a depth information about bloat

On 8/9/20 8:01 PM, Rama Krishnan wrote:
> Hi Mentors,
> 
> 
> I am searching for an understanding of bloat in PostgreSQL
> 
> What is bloat?
> 
> How does it work?
> 
> What is the use of bloat?
> 
> Limitations of bloat?

Read this section of the docs:

https://www.postgresql.org/docs/12/routine-vacuuming.html

and if you still have questions then come back with them.

> 
> Thanks
> 
> Rama Krishnan


-- 
Adrian Klaver
adrian.klaver@aklaver.com

> On Aug 9, 2020, at 9:01 PM, Rama Krishnan <raghuldrag@gmail.com> wrote:
>
> 
> Hi Mentors,
>
>
> I am searching for an understanding of bloat in PostgreSQL
>
> What is bloat?
>
> How does it work?
>
> What is the use of bloat?
>
> Limitations of bloat?
>
> Thanks
>
> Rama Krishnan
Bloat is not a feature of postgreSQL, it’s a consequence. It has no redeeming value.
Updates to tuples generally cause a new tuples to be constructed and the original to be marked as disposable. It is the
jobof the vacuum process to rid the table of this record. Until this happens the marked record as part of the bloat for
thattable.