From: Luke Lonergan <llonergan@greenplum.com>
To: Worky Workerson <worky.workerson@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Best COPY Performance
Date: Tue, 31 Oct 2006 12:16:24 -0800
Message-ID: <C16CEF18.58CF%llonergan@greenplum.com> (raw)
In-Reply-To: <ce4072df0610311211i3944344dx69a4be966cb548c0@mail.gmail.com>
Worky (!),
On 10/31/06 12:11 PM, "Worky Workerson" <worky.workerson@gmail.com> wrote:
> Any recommendations on what to
> look at to find a fix? One thing which I never mentioned was that I
> am using ext3 mounted with noatime,data=writeback.
You can try setting the max readahead like this:
/sbin/blockdev --setra 16384 /dev/sd[a-z]
It will set the max readahead to 16MB for whatever devices are in
/dev/sd[a-z] for the booted machine. You'd need to put the line(s) in
/etc/rc.d/rc.local to have the setting persist on reboot.
- Luke
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To: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com, worky.workerson@gmail.com
Subject: Re: Best COPY Performance
In-Reply-To: <C16CEF18.58CF%llonergan@greenplum.com>
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