[openstreetmap/openstreetmap-website] Why are some diff uploads slow? (#1710)

[Darafei Praliaskouski]

Can we get a slowlog published?

```
shared_preload_libraries = 'auto_explain'
auto_explain.log_min_duration = '100ms'
auto_explain.log_nested_statements = on
auto_explain.log_analyze = on
```

It also seems we can have transactions up to 1M seconds, or 12 days: 
https://munin.openstreetmap.org/openstreetmap/karm.openstreetmap/postgres_querylength_openstreetmap_9_5_main.html

It can also be a reading transaction, say, a forgotten open psql on terminal.

`statement_timeout` and `idle_in_transaction_session_timeout` can help limit it, so it becomes application error traceable in application logs.

To get distribution of queries and keep sanity reading endless postgres logfiles: https://github.com/dalibo/pgbadger

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/1710#issuecomment-353572883
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/rails-dev/attachments/20171222/cffd772a/attachment.html>