From: Ron <ronljohnsonjr@gmail.com>
To: pgsql-admin@lists.postgresql.org
Subject: Re: Postgres DB Slowness
Date: Thu, 22 Aug 2019 09:46:53 -0500
Message-ID: <71b2a6be-9aae-04bb-d006-c46ded2ab243@gmail.com> (raw)
In-Reply-To: <2A91BEF8171A5349931391E0C721CC5359E75079@CPEMS-KPN301.KPNCNL.LOCAL>
References: <2A91BEF8171A5349931391E0C721CC5359E73FC3@CPEMS-KPN301.KPNCNL.LOCAL>
<9840f6c7-5644-1928-e224-b06ecd9297eb@gmail.com>
<2A91BEF8171A5349931391E0C721CC5359E75079@CPEMS-KPN301.KPNCNL.LOCAL>
On 8/22/19 9:35 AM, soumik.bhattacharjee@kpn.com wrote:
>
> *From:*Ron <ronljohnsonjr@gmail.com>
> *Sent:* Thursday, August 22, 2019 4:26 PM
> *To:* pgsql-admin@lists.postgresql.org
> *Subject:* Re: Postgres DB Slowness
>
> On 8/22/19 9:04 AM, soumik.bhattacharjee@kpn.com
> <mailto:soumik.bhattacharjee@kpn.com> wrote:
>
> Hello Members,
>
> We have the below PostgreSQL database recently migrated from Oracle.
>
> The postgres DB parameters are *_attached_* here.
>
> # DB Version: 10
>
> # OS Type: Linux
>
> # Total Memory (RAM): 30 GB
>
> #CPU
>
> nproc --all
>
> 2
>
> There is huge slowness in the database now with any queries.
>
> *Oracle*- Select * from TABLENAME- in takes 0.009 milliseconds
>
> *PostgreSQL*- Same query takes more than 2 minutes.
>
>
> Have you validated that the Postgres server has the same indexes?
>
> If so, did you ANALYZE all the tables?
>
> Yes Ron, we migrated from Oracle as per same structure and indexes.
>
> I did the analyze for 2-3 tables now as per my SQL query I wrote and also
> ran for one particular table below –
>
> VACUUM (FULL,ANALYZE) table_name.
>
What does the query plan for that query look like?
What's the table definition?
Is the hardware comparable? (Might it be a SAN or VM issue?)
--
Angular momentum makes the world go 'round.
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To: pgsql-admin@postgresql.org
Cc: ronljohnsonjr@gmail.com, pgsql-admin@lists.postgresql.org
Subject: Re: Postgres DB Slowness
In-Reply-To: <71b2a6be-9aae-04bb-d006-c46ded2ab243@gmail.com>
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