Re: Max tables in a cluster?

On 4/5/23 02:07, Karthik Krishnakumar wrote:
> Hi admins,
>
> Is there a limit to number of tables that a cluster can support?

https://www.postgresql.org/docs/13/limits.html

> At the moment, one of my clusters has about 250k user tables (plus 150k
> toast tables) across a hundred schemas within a single database.
> My application team wants to double the number of schemas (and with it the
> tables)
> I am looking for both pros and cons of doing this and what tuning can help
> this cluster perform acceptably.
>

> My questions are
> 1. Is there a limit to number of tables a cluster can support effectively?
> 2. My guess is autovacuum would have to be tuned. Current gucs for this are
> max_autovacuum_workers = 6
> maintenance_work_mem = 1GB
> autovacuum_vacuum_scale_factor = 0.2
> autovacuum_vacuum_cost_delay = 20ms
>
> Are there any potential problems that I need to think about ?
>
> My machine specs are as below.
> RAM 256GB
> 32-core CPU
> 7TB SSD
>
> thanks
> karthik
>

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