Hello,
I am relatively new to Postgres but this is my suggestion: Try to add an index on the column substring"(p.SERIAL_NUMBER::TEXT, '[A-Z][0-9]+'::TEXT) ?
Also, analyze the table after adding the index. If index scan is chosen after this performance might improve(I tried to experiment by creating a table with a text field in it and running a similar query on it).
Thank you,
Warm regards,
Sai Sadashiva JK
On Mon, 8 Apr 2024 at 10:22, M Sarwar <sarwarmd02@xxxxxxxxxxx> wrote:
Hi Ron,
I have analyzed and vacuumed following 2 tables which are used by the views.
TEK_INSPECTION_LIST_MCM
TEST_PART_DETAILS_ALL_MCM_MID
I am still seeing unacceptable response time.
Is there any other way to tune a SQL which is referring a view?
Thanks,Sarwar
From: Ron Johnson <ronljohnsonjr@xxxxxxxxx>
Sent: Saturday, April 6, 2024 9:58 AM
To: pgsql-admin@xxxxxxxxxxxxxxxxxxxx <pgsql-admin@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: How to tune SQL performance of function based columns of a view
Postgresql does auto-vacuum and auto-analyze, so the table might have been analyzed and vacuumed.
Table pg_stat_user_tables records the last time that user tables were vacuumed and analyzed.
On Sat, Apr 6, 2024 at 4:44 AM M Sarwar <sarwarmd02@xxxxxxxxxxx> wrote:This is Pg 13.It is running on Aws / Rds.I am not doing any Vacuum/ Analyze manually.Thanks,Sarwar
Sent from my Galaxy
-------- Original message --------From: Ron Johnson <ronljohnsonjr@xxxxxxxxx>Date: 4/6/24 1:15 AM (GMT-05:00)Subject: Re: How to tune SQL performance of function based columns of a view
On Sat, Apr 6, 2024 at 12:33 AM M Sarwar <sarwarmd02@xxxxxxxxxxx> wrote:Hello,
I am working on SQL performance issue.
1. What PG version?2. When did you last VACUUM and ANALYZE the base tables?
