| From: | "Luke Lonergan" <llonergan(at)greenplum(dot)com> |
|---|---|
| To: | "Worky Workerson" <worky(dot)workerson(at)gmail(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Best COPY Performance |
| Date: | 2006-10-31 20:16:24 |
| Message-ID: | C16CEF18.58CF%llonergan@greenplum.com |
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| Lists: | pgsql-performance |
Worky (!),
On 10/31/06 12:11 PM, "Worky Workerson" <worky(dot)workerson(at)gmail(dot)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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