title: Connection pool size with postgres r2dbc-pool
body: <p>I'm not able to open more than 10 connections with spring-webflux and r2dbc (with r2dbc-pool driver <code>0.8.0.M8</code>). My config looks like:</p>
  
  <pre><code>@Configuration
  public class PostgresConfig extends AbstractR2dbcConfiguration {
  
    @Override
    @Bean
    public ConnectionFactory connectionFactory() {
      ConnectionFactory connectionFactory = ConnectionFactories.get(ConnectionFactoryOptions.builder()
          .option(DRIVER, "pool")
          .option(PROTOCOL, "postgresql")
          .option(HOST, host)
          .option(USER, user)
          .option(PASSWORD, password)
          .option(DATABASE, database)
          .build());
      ConnectionPoolConfiguration configuration = ConnectionPoolConfiguration.builder(connectionFactory)
          .maxIdleTime(Duration.ofMinutes(30))
          .initialSize(initialSize)
          .maxSize(maxSize)
          .maxCreateConnectionTime(Duration.ofSeconds(1))
          .build();
      return new ConnectionPool(configuration);
    }
  }
  </code></pre>
  
  <p>When I'm specifying more than 10 connections I get errors like:</p>
  
  <pre><code>org.springframework.dao.DataAccessResourceFailureException: 
  Failed to obtain R2DBC Connection; nested exception is 
  java.util.concurrent.TimeoutException: 
  Did not observe any item or terminal signal within 1000ms in 'lift' 
  (and no fallback has been configured)
      at org.springframework.data.r2dbc.connectionfactory.ConnectionFactoryUtils
      .lambda$getConnection$0(ConnectionFactoryUtils.java:71)
  
  </code></pre>
  
  <p>Moreover, number of connections remain the same as initial size. New connections are not created.</p>