I was usleeping in tiny increments in each iteration of the loop. I didn't try break it into iterative groups like this.

Honestly, I'd prefer to see pg_autovacuum improved to do O(n) rather than O(n^2) table activity. At this point, though, I'm probably not too likely to have much time to hack pg_autovacuum before 8.1 is released, although if it doesn't become integrated by beta feature freeze, I might give it a shot.

But I hope if anyone completes the linear improvement, they'll post to the lists.

--
Thomas F. O'Connell
Co-Founder, Information Architect
Sitening, LLC

Strategic Open Source: Open Your i™

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On Jun 10, 2005, at 9:12 AM, Shelby Cain wrote:

--- "Thomas F. O'Connell" <[EMAIL PROTECTED]> wrote:


Were you sleeping every time through the loop?  How about something
like:

if (j%500 == 1) usleep(100000)

Regards,

Shelby Cain

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