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Re: Query optimization

David G. Johnston <david.g.johnston@gmail.com>

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From: "David G. Johnston" <david.g.johnston@gmail.com>
To: Durgamahesh Manne <maheshpostgres9@gmail.com>
Cc: Ron Johnson <ronljohnsonjr@gmail.com>, pgsql-general <pgsql-general@postgresql.org>
Date: 2025-03-14T03:55:52Z
Lists: pgsql-general 
On Thursday, March 13, 2025, Durgamahesh Manne <maheshpostgres9@gmail.com>
wrote:

>
>
> ------------------------------------------------------------
>>>>> ------------------------------------------------------------
>>>>> ------------------------------------------------------------
>>>>> --------------------------------------
>>>>>
>>>>  Result  (cost=2.80..2.83 rows=1 width=1) (actual time=0.029..0.030
>>> rows=1 loops=1)
>>>    InitPlan 1 (returns $0)
>>>      ->  Index Only Scan using idx_cachekeys on cachekeys
>>>  (cost=0.55..2.80 rows=1 width=0) (actual time=0.028..0.028 rows=1 loops=1)
>>>            Index Cond: ((cachetype = 'BoMatrix'::text) AND (trsid =
>>> 'daznbetuk'::text) AND (brandid = 'daznbet'::text) AND (sportid =
>>> 'BOX'::text) AND (competitionid = 'U-1998'::text) AND (eventid =
>>> 'U-523596'::text))
>>>            Heap Fetches: 1
>>>  Planning Time: 0.084 ms
>>>  Execution Time: 0.043 ms
>>>
>>
>>
>> To return one row takes 43ms is not optimal
>>
>
You are off by a factor of 1000 in your claimed performance.  It’s 0.043ms

David J.