dhaval jaiswal wrote:
> I did check and found it was the bloated size of pg_class which was slowing 
> down the performance.
> 
> It got fixed by adding in routine maintenance task. Things are fine now.

Good to know.

> However, I want to know how come pg_class  (system table) get 
> bloated/affected.
> 
> What could be the possible ways, where i can look into.

The most common cause is high traffic temp table usage.

> Due to business impact auto vacuum is off.

Yeah, that's a really bad idea and you should turn it on and configure
it so that it doesn't impact business.  Having it turned off is
definitely not recommended.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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