Re: Same query doing slow then quick

On 26 September 2012 18:38, FFW_Rude <FFW_Rude@hotmail.com> 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