Re: BUG #15609: synchronous_commit=off insert performance regressionwith secondary indexes

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От Saul, Jean Paolo
Тема Re: BUG #15609: synchronous_commit=off insert performance regressionwith secondary indexes
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Msg-id CA+73ANdxnLbZ_b=2R-fdH=NVu_V_BmaUK4Od-aFvf-i4x+8bmA@mail.gmail.com
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Ответ на Re: BUG #15609: synchronous_commit=off insert performance regressionwith secondary indexes  (Jeff Janes <jeff.janes@gmail.com>)
Ответы Re: BUG #15609: synchronous_commit=off insert performance regressionwith secondary indexes  (Peter Geoghegan <pg@bowt.ie>)
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Hi Jeff,

Insert SQL:
INSERT INTO test_indexes (bool_data , int_data , text_data ) VALUES ( (RANDOM() * 10)::INT % 2 = 0, RANDOM() * 10000, MD5((RANDOM() * 1000)::TEXT) );

pg_bench:
/usr/pgsql-11/bin/pgbench -Upostgres -f ${SQL} -n -c 60 -j 60 -T120 -p ${PORT}

Before each test run, I drop and recreate the table and indexes.

Cheers,

Paolo

On Wed, 30 Jan 2019 at 07:37, Jeff Janes <jeff.janes@gmail.com> wrote:
On Tue, Jan 29, 2019 at 12:46 AM PG Bug reporting form <noreply@postgresql.org> wrote:
The following bug has been logged on the website:

Bug reference:      15609
Logged by:          Jean Paolo Saul
Email address:      paolo.saul@verizonconnect.com
PostgreSQL version: 11.1
Operating system:   CentOS Linux release 7.6.1810 (Core)
Description:       

Summary:
  We are considering upgrading to PG11 and during performance testing we
have found that
  PostgreSQL 11 inserts are around 25% slower than inserts in PostgreSQL
9.5.

Tools Used:
  pgbench (11.1)

Can you show the actual pgbench command line used, and the contents of the file specified by -f ?
 
Cheers,

Jeff

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