Can happen for various reasons. Can you recreate the situation, meaning restarting the servlet or server would start with good qTime and decrease from that point? How fast does this happen?
Start by monitoring the jvm process, with oracle visualVM for example. Monitor for frequent garbage collections or unreasonable memory peacks or opening threads. Then monitor your system to see if there's an io disk latency or disk usage that increases in time, the writing queue to disk exploads, cpu load becomes heavier or network usage's exeeds limit. If you can recreate the decrease and monitor well, one of the above params should pop up. Fixing it after defining the problem will be easier. Good day, Manu On Apr 19, 2013 10:26 AM, "qibaoyuan" <qibaoy...@gmail.com> wrote:
