[gradsusr] GrAds error

[M Z]

 Hello, I face with this error in GrAds in my linux.I dont know what can I do?could you please help me.Thank you
*** WARNING! ****** The I/O for this variable will be extremely slow *** because the chunks are too big to fit in the cache *** chunk size = 12600 bytes  (25 * 21 * 6 * 1 * 4 bytes)*** cache size = 0 bytes *** There are two ways to control the cache size: *** add a CACHESIZE entry to the descriptor file *** or change the cache size scale factor with 'set cachesf' *** Please read http://iges.org/grads/gadoc/compression.html 

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