Module: PgHero::Methods::Connections

Included in:
Database
Defined in:
lib/pghero/methods/connections.rb

Instance Method Summary collapse

Instance Method Details

#connection_sources ⇒ Object 



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# File 'lib/pghero/methods/connections.rb', line 59

def connection_sources
  select_all <<~SQL
    SELECT
      datname AS database,
      usename AS user,
      application_name AS source,
      client_addr AS ip,
      COUNT(*) AS total_connections
    FROM
      pg_stat_activity
    GROUP BY
      1, 2, 3, 4
    ORDER BY
      5 DESC, 1, 2, 3, 4
  SQL
end

#connection_states ⇒ Object 



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# File 'lib/pghero/methods/connections.rb', line 43

def connection_states
  states = select_all <<~SQL
    SELECT
      state,
      COUNT(*) AS connections
    FROM
      pg_stat_activity
    GROUP BY
      1
    ORDER BY
      2 DESC, 1
  SQL

  states.to_h { |s| [s[:state], s[:connections]] }
end

#connections ⇒ Object 



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# File 'lib/pghero/methods/connections.rb', line 4

def connections
  if server_version_num >= 90500
    select_all <<~SQL
      SELECT
        pg_stat_activity.pid,
        datname AS database,
        usename AS user,
        application_name AS source,
        client_addr AS ip,
        state,
        ssl
      FROM
        pg_stat_activity
      LEFT JOIN
        pg_stat_ssl ON pg_stat_activity.pid = pg_stat_ssl.pid
      ORDER BY
        pg_stat_activity.pid
    SQL
  else
    select_all <<~SQL
      SELECT
        pid,
        datname AS database,
        usename AS user,
        application_name AS source,
        client_addr AS ip,
        state
      FROM
        pg_stat_activity
      ORDER BY
        pid
    SQL
  end
end

#total_connections ⇒ Object 



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# File 'lib/pghero/methods/connections.rb', line 39

def total_connections
  select_one("SELECT COUNT(*) FROM pg_stat_activity")
end