Re: meaning of (to prevent wraparound) ..??

[Atul Kumar <akumar14871@xxxxxxxxx>]

Thanks Jessica. Could help me out by sharing documents that can help me understand “to prevent wraparound “ in simplest way, postgres doc is little bit harder for a newbee like me.

Regards 

Atul

On Thursday, November 26, 2020, Jessica Sharp <jessica@xxxxxxxxxxxxxxxx> wrote:

Hi Atul,

This means autovacuum is doing it’s job — most likely no need to be alarmed here based on this alone. The autovacuum is helping avoid a txid limit. This is part of PostgreSQL MVCC. You may check that section of the documentation for more information on this. 

On Wed, Nov 25, 2020 at 22:54 Atul Kumar <akumar14871@xxxxxxxxx> wrote:

Hi,

I have autovacuum running in background from last 30-40 minutes but I
noticed that it is with "(to prevent wraparound)" say for example
autovacuum: VACUUM trk.move (to prevent wraparound).

So what is the meaning of "(to prevent wraparound)" here ?

Will it impact the autovacuum anyhow ?

Please help me.



Regards,
Atul

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Kind regards, 

Jessica Sharp

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