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coder/coderd
Callum Styan 4fab14b40b fix: limit the scope of the template average build time query to the last 100 (#19648)
This PR should resolve https://github.com/coder/internal/issues/719 by
limiting the `workspace_builds` rows selected by the query to the most
recent 100 builds of a template, as opposed to all builds in the last
30d. For our own internal templates with the most builds (1700-2000 in a
30d period) this should cut the query execution time by about 80%.

Unless we have some restriction on keeping the 30d period, contract
related or otherwise, this seems like a safe change to make. In addition
to the execution speed improvements it also means the memory for the
query is bounded as well.

If we want to keep a 30d time period for the avg build time value I
think it's worth exploring a purpose built solution such as histogram
structures where the build times could be bucketized by template ID as
they're observed.

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Signed-off-by: Callum Styan <callumstyan@gmail.com>
2025-09-01 09:31:21 -07:00
..
2025-07-15 14:55:34 +10:00