Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade

From: Henrik Cednert (Filmlance)
Subject: Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade
Date: ,
Msg-id: C9386B1B-EFC1-470D-A265-52938FCB25BF@filmlance.se
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In response to: RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman)
Responses: RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman)
List: pgsql-performance

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pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
 RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman, )
  Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
   RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman, )
    Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
     RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman, )
      Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
       RE: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Igor Neyman, )
  Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Shaul Dar, )
 Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Tom Lane, )
  Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Robert Haas, )
   Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Tom Lane, )
    Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
     Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Tom Lane, )
      Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
       Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
        Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Matthew Hall, )
         Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
          Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
           Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Matthew Hall, )
            Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
         Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Andres Freund, )
    Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
 Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Patrick KUI-LI, )
  Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  ("Henrik Cednert (Filmlance)", )
   Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Gunther, )
    Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Laurenz Albe, )
     Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade  (Claudio Freire, )

RAID6. Doing disk test I have 1000MB/sec write and 1200MB/sec read. 

--
Henrik Cednert
cto | compositor

Filmlance International
mobile [ + 46 (0)704 71 89 54 ]
skype  [ cednert ]

On 21 Nov 2017, at 17:34, Igor Neyman <> wrote:

 
From: Henrik Cednert (Filmlance) [mailto:] 
Sent: Tuesday, November 21, 2017 11:27 AM
To: 
Subject: Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade
 
Ahh! Nice catch Igor. Thanks. =)  
 
Will try and see if resolve can read that back in.
 
Still very curious about the 3x slowdown in 9.5 pg_dump though.
 

--
Henrik Cednert
cto | compositor

Filmlance International
 
Basically, you are dumping 40GB of data.
I’d say even 212 minutes under 8.4 version was too slow.
What kind of RAID is it? RAID1/RAID10/RAID5?
 
Regards,
Igor Neyman


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From: Tom Lane
Date:
Subject: Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade
From: "Henrik Cednert (Filmlance)"
Date:
Subject: Re: pg_dump 3 times as slow after 8.4 -> 9.5 upgrade