webMathematica has a number of ways it can be configured so that its operation can be customized. These are some of the settings that can be changed.
KernelPoolName — the name of a kernel pool
KernelNumber — the number of kernels in a pool
KernelExecutable — the path to the kernel executable for a pool
KernelTimeLimit — the maximum time for each computation
KernelInitializeCode — Mathematica code to run during startup
KernelDestroyCode — Mathematica code to run during shutdown
KernelAcquireCode — Mathematica code to run when a kernel is allocated
KernelReleaseCode — Mathematica code to run when a kernel is released