Horton

Re: VACUUM degrades performance significantly. Database

Shridhar Daithankar <shridhar_daithankar@persistent.co.in>

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From: Shridhar Daithankar <shridhar_daithankar@persistent.co.in>
To:
Cc: pgsql-general@postgresql.org
Date: 2003-10-17T13:42:24Z
Lists: pgsql-general 
Vivek Khera wrote:

>>>>>>"S" == Stephen  <jleelim@xxxxxx.com> writes:
> 
> 
> S> The system is actually idling when I ran the tests (load average: 0.01,
> S> 0.02, 0.00). When VACUUM runs, load average increases quickly (load average:
> S> 1.77, 0.60, 0.21) just by running psql on command line and issuing 2
> S> queries. I've been running PostgreSQL for over 3 years now and IIRC VACUUM
> 
> Your CPU usage is irrelevent here.  What's your *disk* utilization.
> Does linux have systat and/or iostat to tell you how busy your disks
> are?

It has a rather verbose vmstat which gives everything.

  Shridhar