l...@gnu.org (Ludovic Courtès) skribis:

> My point is /latestbuilds and /queue already take several seconds on the
> database that we have on berlin, which is quite big.  So we have a
> problem already.

Turns out creating the relevant indexes helps a lot, unsurprisingly I
guess:

  
https://git.savannah.gnu.org/cgit/guix/guix-cuirass.git/commit/?id=db27955ad3fae260ee2aa4bace8dd6a4115d338c

I also discovered SQLite’s “EXPLAIN QUERY PLAN”, which is pretty cool:

  https://www.sqlite.org/lang_explain.html

With that /latestbuilds still usually takes a bit more than 2 seconds.
This could be due to the repeated ‘Outputs’ queries via ‘db-get-outputs’.

Ludo’.

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