Poor performance for 10 concurrent users on Win2008+IIS7.5+FastCGI

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Samuellai's picture

Hi Experts,

We created a new website using Drupal 7, IIS7.5, PHP5.3, WIN2008, MSSQL2008, and FastCgi, 4 CPUs, 16GB ram, Wincache.

It works fine when only 1 visitor browsing the homepage, it takes around 2-3 second to load it. But when I try to conduct a stress test by simulating 10 concurrent users, the loading time for homepage turned into 5-6 seconds and the CPU usage is almost 100%.

Could you please advise how to improve such situation?

Looking forward to hear from you.

Best regards,
Samuel