http://msmvps.com/blogs/laflour/pages/net-tips-wcf.aspxback to content GENERAL: In a typical Enterprise system only 1 percent of all clients make concurrent calls (a high-load Enterprise system has 3 percent of concurrent calls). If your system can concurrently sustain only 100 expensive service instancesenCommunityServer 2008.5 SP2 (Build: 40407.4157)