liang8283 commented on issue #1926:
URL: https://github.com/apache/cloudberry/issues/1926#issuecomment-5490933566
pg_stat_statement cannot be used for cloudberry because it only saves the
performance statistics for a single node. It cannot summarize the stats across
all the nodes for cloudberry.
The open source version of cloudberry does not have built-in tools for
monitoring IO. Here are some alternatives for your reference:
- If the Resource Group is enabled, you can get the IO stats via the query:
`SELECT * FROM gp_toolkit.gp_resgroup_iostats_per_host;`
- If you mostly use heap tables, the view `pg_statio_all_tables` can also be
used.
```
SELECT relname,
sum(heap_blks_read) AS heap_read,
sum(heap_blks_hit) AS heap_hit,
sum(idx_blks_read) AS idx_read
FROM gp_dist_random('pg_statio_all_tables')
GROUP BY relname
ORDER BY heap_read DESC limit 10;
```
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