This is one of the best articles I've ever read on performance tuning in Java. The senior engineer at NHN Corporation has shared his experience and explained the importance of MaxClients parameter in Apache that significantly affects the overall system performance when GC occurs. The author provides several examples through which you will understand the problem MaxClients value causes. He also explains how to reliably set the proper value for MaxClients depending on the available system memory. Refer to this blog to learn more.