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Re: Automatic deltify nice - turning it off temporarily better

From: Branko Čibej <brane_at_xbc.nu>
Date: 2003-12-17 12:50:47 CET

John Peacock wrote:

> I ran the full APC (Archive of Perl Changes) with 0.34.0 in under 8
> hours (which is less than 1/2 the time it previously took), plus about
> 2 hours to run a manual deltify on the whole repository. This is a
> good thing!
> I tried to run a dump/load of almost the exact same thing last night
> using 0.35.0-to-be and in ~8 hours I only got about 1/2 way through
> the 18000 revisions. This is bad. :(
> Since the deltify is now happening in background, there is a lot more
> contention for the database during the load, even though I know for
> certain that I am the only process (and I have plenty of disk space).
> Is there any chance that we could have either a global command line
> option or an ENV variable which will turn off auto-deltify, for these
> narrow use cases? I need to be able to supress the deltify for both
> 'svnadmin load' as well as 'svn ci' (for when I am running apc2svn).

In cases like you describe, it would be better to have _synchronous_
deltification rather than asynchronous. IIRC, Mike ran tests with
synchronous deltification during commit vs. manual deltification after
load, and the cumulative time was the same.

Brane Čibej   <brane_at_xbc.nu>   http://www.xbc.nu/brane/
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Received on Wed Dec 17 12:53:50 2003

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