| 摘要 |
PROBLEM TO BE SOLVED: To provide a server multiplicity control method, capable of controlling the multiplicity of a function layer server and a data layer server to the optimal value according to the load of this system. SOLUTION: A server CPU activity ratio C is to be consumed by a server 18 is measured by a CPU activity ratio measuring means 15, and the server CPU activity ratio C is compared with a CPU activity ratio upper limit value A preliminarily designated by a CPU activity ratio upper limit storing means 12 and a CPU activity ratio lower limit value B designated by a CPU activity ratio lower limit string means 13 by a multiplicity deciding means 14, and when it is decided that the server CPU activity ratio C is larger than the CPU activity ratio upper limit value A, the multiplicity of the server is increased by a multiplicity increasing means 16, and when the server CPU activity ratio C is smaller than the CPU activity ratio lower limit value B, the multiplicity of the server is decreased by a multiplicity decreasing means 17.
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