Check-valid-connection

Front-end
#1

Pessoal, utilizo o tomcat e preciso colocar isso na configuracao p tentar resolver um problema:

<check-valid-connection-sql>select 1</check-valid-connection-sql>  
<new-connection-sql>select 1</new-connection-sql>  
<idle-timeout-minutes>1</idle-timeout-minutes>

Em q arquivo eu devo colocar essas configuracoes ? Seria o server.xml ?

[]'s

#2