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Re: [BUGS] BUG #14530: Logical Decoding Slowness - Mailing list pgsql-bugs

From Huan Ruan
Subject Re: [BUGS] BUG #14530: Logical Decoding Slowness
Date
Msg-id CAGgcTZsR_+LqZDJ+6q5hBhSmJAY5yOmGj_6DK9x4MAYgee0UjA@mail.gmail.com
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In response to Re: [BUGS] BUG #14530: Logical Decoding Slowness  (Andres Freund <andres@anarazel.de>)
Responses Re: [BUGS] BUG #14530: Logical Decoding Slowness  (Andres Freund <andres@anarazel.de>)
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Hi Andres

Thanks for your reply.

On Thu, 9 Feb 2017 at 14:29 Andres Freund <andres@anarazel.de> wrote:
Hi,

I have a suspicion what's causing this, but would it be possible for you
to run a profile (with perf or such) and report the result?

Attached 
  • perf.data.subtran100k.gz is 'perf record -a -g -s -- ' output for the pg_logical_slot_get_changes() query in script 1 for 100,000 subtransactions.
  • perf.data.createtable5k.gz is 'perf record -a -g -s -- ' output for the pg_logical_slot_get_changes() query in script 2 for 5,000 create tables in one transaction.     
Regards
Huan 
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