Re: PostgreSQL Tuning and running a query on a big data

On 11/17/20 11:34 AM, Sachin Kumar wrote:

Hi Experts,

1.   I require guidance in tuning my PostgreSQL server installed on Windows 2016 Server. Please help me out with the configuration. or a url to ture PostgreSQL Server

I am not able to find an expert who can help me in Postgres, that why I am asking too many questions. I will be really grateful if you can help me out.

2.   I have to upload a 5 GB file into a Table. Will it allow a 5GB file to be uploaded? or I have to increase the tablespace of the particular table.

Postgres auto-expands files as needed.

3.   while running the query on 1 million cards it is taking too much time, say 150 min. is there any way I can reduce it.

Query I am using

UPDATE hk_card_master_test m
SET "ACCOUNT_NUMBER" = v."v_account_number", "ISSUANCE_NUMBER" = v."v_issuance_number","cron"=1
FROM (
SELECT h."id",h."CARD_SEQUENCE_NUMBER" ,h."ACCOUNT_NUMBER" ,h."ISSUANCE_NUMBER",c."ACCOUNT_NUMBER" v_account_number,c."ISSUANCE_NUMBER" v_issuance_number
FROM
hk_card_master_test h
JOIN
vdaccount_card_bank c
ON SUBSTR(c."ACCOUNT_NUMBER", 1, 10) = h."CARD_SEQUENCE_NUMBER"
ORDER BY h."id" ASC LIMIT 1000
) AS v
WHERE m."CARD_SEQUENCE_NUMBER" = v."CARD_SEQUENCE_NUMBER";

Did you put indices on m."CARD_SEQUENCE_NUMBER and SUBSTR(c."ACCOUNT_NUMBER", 1, 10)?

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