#29073: CONN_MAX_AGE and others not being picked up from settings file
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Reporter: Karl | Owner: nobody
Kuehn |
Type: Bug | Status: new
Component: Database | Version: master
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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In trying to solve some performance issues I am observing (probably our
code) I tried to use the `CONN_MAX_AGE` setting documented here:
https://docs.djangoproject.com/en/2.0/ref/settings/#conn-max-age
I have a `pgbouncer` instance setup, so it was easy to observe connections
going to the database, and I found that regardless of that setting the
connections were being dropped at the end of every request, regardless of
what value I set (even invalid ones have no effect).
Using `git grep CONN_MAX_AGE | grep '\.py:'` I found that this value is
never being read from the settings file, and only defaulted in
`django/db/utils.py:ConnectionHandler.ensure_defaults()`. This is true
both on current (as of this writing) `master` and version 1.11.1 (what we
are currently using). It may well go farther back than that, but I have
not checked.
I also checked `ATOMIC_REQUESTS`, and `AUTOCOMMIT` and they show the same
pattern. Other values there are more complicated, and I did not check.
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Ticket URL: <https://code.djangoproject.com/ticket/29073>
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