June 2024
Intermediate to advanced
456 pages
11h 34m
English
Content preview from High Performance PostgreSQL for RailsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Identifying Connection Errors and Problems
In this section, you’ll use psql to analyze connections. Connections may be viewed in PgHero.[277]
Besides exhausting connections, you may run into other types of connection-related errors:
- “Transaction ID wraparound”
- Runaway or “zombie” queries that never finish
To minimize the effects of those errors, you’ll add the following safeguards:
-
A statement_timeout that sets a max allowed amount of time for statements to run
-
A lock_timeout that sets a max allowed time a statement can wait to acquire a lock
-
A idle_in_transaction_session_timeout[278] that sets a max allowed time for idle connections that have started a transaction, but have not committed, to run for before they’re canceled
These are all parameters ...
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