Re: Slow while inserting and retrieval (compared to SQL Server)

From: Benedict Holland <benedict(dot)m(dot)holland(at)gmail(dot)com>
To: sivapostgres(at)yahoo(dot)com
Cc: pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org>, Thomas Kellerer <shammat(at)gmx(dot)net>
Subject: Re: Slow while inserting and retrieval (compared to SQL Server)
Date: 2021-02-17 15:06:37
Message-ID: CAD+mzoyB=T1P_355+50oLpPa0Mi8mZ1AsK8OpqX+jKBcmqwxJg@mail.gmail.com
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Yea. Let's see what the metrics actually are. It is possible that the data
gets loaded in instantly but for whatever reason you do t see the reflected
changes.

On Wed, Feb 17, 2021, 9:09 AM sivapostgres(at)yahoo(dot)com <sivapostgres(at)yahoo(dot)com>
wrote:

> So far no performance tuning done for sql server. It works fine for the
> load. Even the express edition which is free, works better. I don't think
> postgres will be so slow to insert such a low number of records in an empty
> database.
>
> I'll be preparing the required sql statements to insert those records in
> pgadmin and see the timings, tomorrow.
>
>
> On Wednesday, 17 February, 2021, 07:29:29 pm IST, Benedict Holland <
> benedict(dot)m(dot)holland(at)gmail(dot)com> wrote:
>
>
> Sql server is a 10k dollar to 1 million dollar application (or more) that
> is specifically optimized for windows and had limited to no support
> anywhere else. Postgres is free and from my experience, comes within 5% of
> any other dbms. Inserting 1 row at a time with auto commit on will be a bit
> slow but it shouldn't be noticeable. What times are you seeing if you do
> this with pgadmin4 compared to sql server? Also, have you done any
> performance tuning for postgres server? There are many documents detailing
> performance tuning your servers, like you probably did, at some point, with
> your sql server.
>
> Thanks,
> Ben
>
> On Wed, Feb 17, 2021, 8:28 AM sivapostgres(at)yahoo(dot)com <
> sivapostgres(at)yahoo(dot)com> wrote:
>
> We use datawindows. Datawindows will send the required DML statements to
> the database. And it sent in format 1 <single row update>.
>
> IN start of the application, Autocommit set to True.
> Before update of any table(s)
> Autocommit is set to False
> Insert/Update/Delete records
> If success commit else rollback
> Autocommit is set to True
>
> This has been followed for decades and it's working fine with Sql server.
>
>
> Here we are trying to insert just 10 records spread across 6 tables, which
> is taking more time.. that's what we feel. The similar work in SQL Server
> takes much less time < as if no wait is there >.
>
> On Wednesday, 17 February, 2021, 06:48:35 pm IST, Thomas Kellerer <
> shammat(at)gmx(dot)net> wrote:
>
>
> sivapostgres(at)yahoo(dot)com schrieb am 17.02.2021 um 13:01:
>
> > To populate some basic data we try to insert few records (max 4
> > records) in few tables (around 6 tables) from one window. We feel
> > that the insert time taken is longer than the time taken while using
> > Sql Server. We tested almost a similar window that updated the
> > similar table(s) in SQL server, which was faster. With Postgres
> > database, we need to wait for a couple of seconds before the
> > insert/update is over, which we didn't feel in Sql Server.
>
>
>
> Are you doing single-row inserts like:
>
> insert into ... values (..);
> insert into ... values (..);
> insert into ... values (..);
> insert into ... values (..);
>
> or are you doing multi-row inserts like this:
>
> insert into ... values (..), (..), (..), (..);
>
> Typically the latter will perform much better (especially if autocommit is
> enabled)
>
>
>
>
>

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