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Re: Max tables in a cluster? - Mailing list pgsql-admin

From Ron
Subject Re: Max tables in a cluster?
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Msg-id a7644ae4-a388-7cdc-e5dc-f3dca24e4a7f@gmail.com
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In response to Max tables in a cluster?  (Karthik Krishnakumar <karthikk@zohocorp.com>)
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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


--
Born in Arizona, moved to Babylonia.

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