Re: [PATCH] Add features to pg_stat_statements

[Katsuragi Yuta]

On 2020-09-19 16:35, legrand legrand wrote:

+1 !

An other way is to log evictions, it provides informations about time and

amount :

        for (i = 0; i < nvictims; i++)
        {
                hash_search(pgssp_hash, &entries[i]->key, HASH_REMOVE, NULL);
        }

        pfree(entries);

/* trace when evicting entries, if appening too often this can slow queries

...
         * increasing pg_stat_sql_plans.max value could help */
         ereport(LOG,
                (errmsg("pg_stat_sql_plans evicting %d entries", nvictims),
                errhidecontext(true), errhidestmt(true)));



--

Sent from: https://www.postgresql-archive.org/PostgreSQL-hackers-f1928748.html

Thank you for your comments!
In addition to providing a view that is like a summary of history,
logging might be a good choice.

Regards,
Katsuragi Yuta