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Re: Same query doing slow then quick - Mailing list pgsql-performance

From FFW_Rude
Subject Re: Same query doing slow then quick
Date
Msg-id SNT111-W2098D2E9847FEE99A5828E19C0@phx.gbl
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In response to Re: Same query doing slow then quick  (Nikolay Ulyanitsky <lystor@gmail.com>)
Responses Re: Same query doing slow then quick
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so installing postgresql-contrib stopped my server and i don't have pgbench in it. It is still pgbench command not found...

Could you explain what you are asking me to do because i don't really know what i'm doing...

Rude - Last Territory

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Date: Wed, 26 Sep 2012 08:53:29 -0700
From: [hidden email]
To: [hidden email]
Subject: Re: Same query doing slow then quick

On 26 September 2012 18:38, FFW_Rude <[hidden email]> wrote:
> root@testBI:/etc/postgresql/9.1/main# hdparm -tT /dev/sda
>  Timing cached reads:   892 MB in  2.01 seconds = 444.42 MB/sec
>  Timing buffered disk reads: 190 MB in  3.02 seconds =  62.90 MB/sec

It's OK for single HDD.


> Is fsync off by default ? I have
> #fsync = on (so it's off right ?).

Disable fsync for pgbench temporarily.


> pgbench is not found on my server. Do i have to apt-get install pgbench ?

Install the postgresql-contrib deb:
http://pkgs.org/download/postgresql-contrib

# sudo apt-get update
# sudo apt-get install postgresql-contrib


--
With best regards,
Nikolay


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