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

Darafei Praliaskouski notifications at github.com
Fri Dec 22 10:45:52 UTC 2017

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: 

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

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