weblogic9.x - Time out issue when users are working on weblogic application in peak bussiness time -

kindly me find out root cause , issue resolution of weblogic application time out issue. during month ends users facing time out issue in weblogic application. please me find out causing issue, can check logs , all. new weblogic. using weblogic 9.2

thanks in advance. - firo

weblogic 9.2 old , outdated version. first recommendation upgrade weblogic 12c need take full thread dumps of weblogic jvm. these thread dumps identify bottlenecks in application