私は私の開発環境のconfig/database.yml
で、以下の設定で、「レールコンソール」を通じて、シングルスレッドのRails 5.0アプリケーションを実行している:Railsで一度に開いているデータベース接続を調べるにはどうすればよいですか?
development:
adapter: postgresql
encoding: utf8
database: sims
username: postgres
password: password
pool: 5
timeout: 15000
host: 127.0.0.1
必ず、以下の私のコードを実行すると、最終的に "と死んでしまいます接続」エラーを取得できませんでした:
pool = Concurrent::FixedThreadPool.new(1)
promises = links.map do |link|
Concurrent::Promise.execute(executor: pool) do
result = process_link(link)
if result
if result.kind_of?(Array)
result.each do |my_obj|
my_obj.update_attributes({ :a => a })
records_processed = records_processed + my_obj.matches.count
end
else
records_processed = records_processed + result.matches.count
result.update_attributes({ :a => a })
end
end
end
end
promises.map(&:wait).map(&:value!)
にはどうすれば接続が閉じされていない、あるいはまだそれは、これが発生する原因となるものをクエリを実行しているかを把握することができますか?同時クエリが一度に実行されるべきではないので、私は困惑しています。
Error during processing: (ActiveRecord::ConnectionTimeoutError) could not obtain a connection from the pool within 5.000 seconds (waited 5.003 seconds); all pooled connections were in use
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:202:in `block in wait_poll'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:193:in `loop'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:193:in `wait_poll'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:154:in `internal_poll'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:278:in `internal_poll'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:148:in `block in poll'
/Users/nataliab/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:158:in `synchronize'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:148:in `poll'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:717:in `acquire_connection'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:490:in `checkout'
/Users/nataliab/.rvm/gems/[email protected]/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:364:in `connection'