SQL server performance issues. We have an application that uses SQL. During the day this application can get very slow. Something that loads in less than a seconds after hours can take 4-5 seconds during the day. In talking with the developers they added special logging to there application to determine where the delay was. They claim that it is while querying data from SQL. This would imply that SQL is overloaded or bottle necked somewhere. After literally weeks of troubleshooting I cannot find anything. Network is under 10%.. memory usage is normal ... CPU is normal. I just can't find a reason for the slowness. Is there anything further I can do to help pinpoint the issue. I even tried SQL monitoring software free trial for 2 weeks and it reported no issues.