<datasource jta="true" jndi-name="java:jboss/datasources/marcoDS" pool-name="marcoDS" enabled="true" use-java-context="true" use-ccm="true">
                    <connection-url>jdbc:postgresql://vm:5432/erp</connection-url>
                    <connection-property name="url">
                        jdbc:postgresql://devdb:5432/erp
                    </connection-property>
                    <driver>postgres</driver>
                    <new-connection-sql>select 1</new-connection-sql>
                    <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
                    <pool>
                        <min-pool-size>5</min-pool-size>
                        <max-pool-size>100</max-pool-size>
                        <prefill>false</prefill>
                        <use-strict-min>false</use-strict-min>
                    </pool>
                    <security>
                        <user-name>michal</user-name>
                        <password>123</password>
                    </security>
                    <validation>
                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker"/>
                        <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter"/>
                    </validation>
                </datasource>