> I want to get the number of misses for the buffer pool of PostgreSQL.
> Is there any methods or
> performance tools I can use to get the information?
Yes. Please see the manual chapters on "Monitoring database activity".
The pgstatio_* views in particular.
PS. This mailing list is for discussion on development of PostgreSQL.
Questions on usage belong to pgsql-general, or one of the other user
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