Re:Re: how to know whether query data from memory after pg_prewarm

But I use windows server 2012R.
pgfincore can not run on the windows.
Is there some replacements in windows system?

At 2018-09-19 15:44:06, "Cédric Villemain" <cedric(at)2ndQuadrant(dot)com> wrote:
>Le 19/09/2018 à 05:29, Thomas Munro a écrit :
>> On Wed, Sep 19, 2018 at 1:35 PM jimmy <mpokky(at)126(dot)com> wrote:
>>> I use select pg_prewarm('table1','read','main') to load data of table1 into the memory.
>>> when I use select count(1) from table1 group by aa to query data.
>>> I find the speed of query is not fast, I wonder whether it query data from memory.
>>> And it is slower than Oracle, both of Oracle and Postgresql has same table and count of data.
>>> when pg_prewarm use 'read' mode, the data is put into the OS cache, how to examine the table which is pg_prewarmed into the OS cache .
>>> I know pg_buffercache ,but it just examine the table in the shared buffer of Postgresql, not the table in the OS cache.
>>
>> This is a quick and dirty hack, but it might do what you want:
>>
>> https://github.com/macdice/pgdata_mincore
>>
>> Tested on FreeBSD, not sure how well it'll travel.
>
>You can use pgfincore extension for that purpose, and more.
>
>https://github.com/klando/pgfincore/blob/master/README.md
>
>
>--
>Cédric Villemain +33 (0)6 20 30 22 52
>http://2ndQuadrant.fr/
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