This query allows you to monitor the : autovacuum_freeze_max_age
SELECT datname, round(age(datfrozenxid)/to_number(current_setting('autovacuum_freeze_max_age'),'999999999')*100,1) as Percent FROM pg_database where datname != 'template0';
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[Postgres] Monitor wait event
\t
select wait_event_type, wait_event from pg_stat_activity where pid !=pg_backend_pid();
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[Postgres] Solve PostgreSQL DataFileRead and buffer_io with Parameter Tuning
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[Postgres] Tuto tuning
This site helped to resolve IPC wait event : Postgres checkpoint tuning | Tembo Docs
You have to adapt the checkpoint_timeout within the max_wal_size.
If the max_wal_size is 8Go then you can increase the default value of checkpoint_timeout (which is 5 min).
For big database with big wal size, you need to increase the checkpoint_timeout to avoid IPC wait event on the Buffers.