Date: Wed, 13 Apr 2022 07:17:56 -0400
From: andrew cooke <andrew@acooke.org>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: "Kumar, Mukesh" <MKumar@peabodyenergy.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>,
	MUKESH KUMAR <mukesh.kumar14@tcs.com>
Subject: Re: Performance for SQL queries on Azure PostgreSQL PaaS instance
Message-ID: <20220413111756.niehtkrpcv4ptf2h@acooke.org>
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On Wed, Apr 13, 2022 at 10:34:24AM +0200, Laurenz Albe wrote:
> On Tue, 2022-04-12 at 09:10 +0000, Kumar, Mukesh wrote:
> > We have recently done the migration from Oracle Database Version 12C to Azure
> > PostgreSQL PaaS instance version 11.4 and most of the application functionality
> > testing has been over and tested successfully 
> >  
> > However, there is 1 process at application level which is taking approx. 10 mins
> > in PostgreSQL and in oracle it is taking only 3 mins.
> >  
> > After investigating further we identified that process which is executed from
> > application end contains 500 to 600 no of short SQL queries into the database.
> > We tried to run the few queries individually on database and they are taking
> > less than sec in Postgres Database to execute, and we noticed that in Oracle
> > taking half of the time as is taking in PostgreSQL. for ex . in oracle same
> > select statement is taking 300 millisecond and in PostgreSQL it is taking
> > approx. 600 millisecond which over increases the execution of the process.
> >  
> > Oracle Database are hosted on ON- Prem DC with dedicated application server on
> > OnPrem and same for PostgreSQL.
> 
> How can a database hosted with Microsoft be on your permises?

Not OP, but it couldn't it be
https://azure.microsoft.com/en-us/overview/azure-stack/ ?

> Apart from all other things, compare the network latency.  If a single request
> results in 500 database queries, you will be paying 1000 times the network
> latency per request.
> 
> Yours,
> Laurenz Albe
> -- 
> Cybertec | https://www.cybertec-postgresql.com
> 
> 
>