[PG13 Upg] Review the monitoring for the upgrade benchmarking
We need to check the changes that PG 13 will bring to our monitoring in the benchmark env
Additionally, we need to take advantage of new views and info that we can add to our monitoring. Eg.: pg_stat_slru: https://pgpedia.info/p/pg_stat_slru.html
Acceptance criteria:
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Review the existing monitoring and add more metrics if needed
Edited by Jose Finotto