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Disable wal_autocheckpoint and run PASSIVE checkpoints from one elected writer process. Contenders start in console/rake (initializer), Puma workers (including WEB_CONCURRENCY=auto), and Resque children, with failover, capped error backoff, and tests for lock takeover. Co-authored-by: Thomas Klemm <github@tklemm.eu>
39 lines
1011 B
YAML
39 lines
1011 B
YAML
# SQLite. Versions 3.8.0 and up are supported.
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# gem install sqlite3
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#
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# Ensure the SQLite 3 gem is defined in your Gemfile
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# gem "sqlite3"
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#
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default: &default
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adapter: sqlite3
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pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 10 } %>
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timeout: 5000
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default_transaction_mode: immediate
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# Checkpoint on a background connection instead (SqliteWalCheckpoint). Every
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# non-test writer process runs a contender so this is never left without one.
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pragmas:
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wal_autocheckpoint: 0
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development:
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primary:
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<<: *default
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database: storage/db/development.sqlite3
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# Warning: The database defined as "test" will be erased and
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# re-generated from your development database when you run "rake".
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# Do not set this db to the same as development or production.
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test:
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primary:
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<<: *default
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database: storage/db/test.sqlite3
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performance:
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primary:
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<<: *default
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database: storage/db/performance.sqlite3
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production:
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primary:
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<<: *default
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database: storage/db/production.sqlite3
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