Chapter 23 WAN Optimization, Web Cache, Explicit Proxy, and WCCP : Storage : Configuring WAN optimization and Web cache storage : Adjusting the relative amount of disk space available for byte caching and web caching
  
Adjusting the relative amount of disk space available for byte caching and web caching
By default the config wanopt storage command allocates the same amount disk for byte caching and for web caching. In some cases you may want to adjust the relative amounts of disk space available for these two uses. For example, if you have not implemented web caching you may want to reduce the amount of disk space used for web caching and increase the amount of space used for byte caching.
You can adjust the relative amount of disk space used for byte caching using the webcache-storage-percentage option of the config wanopt storage command. This option adjusts the percentage in the range of 0 to 100. The default percentage is 50.
To reduce the percentage of space allocated on the Internal disk for web caching to 10% (resulting in the amount of space for byte caching increasing to 90%) enter:
config wanopt storage
edit Internal
set webcache-storage-percentage 10
end
You can enter this command at any time without disrupting web caching or byte caching performance. Data may be lost from the cache that is reduced in size.