Oracle Solaris Tunable Parameters Reference Manual



Specifies the maximum amount of physical memory (in pages) used by NCA for caching the pages. This value should not be more than 75 percent of total memory.


25 percent of physical memory


1 percent to maximum amount of physical memory



When to Change

When using NCA on a system with more than 512 Mbytes of memory. If a system has a lot of physical memory that is not being used, increase this parameter. Then, NCA will efficiently use this memory to cache new objects. As a result, system performance will increase.

This parameter should be increased in conjunction with nca_vpmax, unless you have a system with more physical memory than virtual memory (a 32-bit kernel that has greater than 4 Gbytes memory). Use pagesize(1) to determine your system's page size.

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