GB DEFPERCENT
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GB_DEFPERCENT is a dynamic system parameter that controls caching of files on Alpha and Integrity servers. If a file is connected to RMS with the RMS global buffer DEFAULT option enabled, either a percentage (GB_DEFPERCENT) of the file is cached or up to GB_CACHEALLMAX blocks of it are cached, whichever results in a larger global buffer count. A percentage greater than 100 percent can be specified for GB_DEFPERCENT to provide growing room for a file in the global cache.
Note that although a maximum cache size of %x7FFFFFFF is supported for an indexed file, sequential and relative file organizations are restricted to a maximum cache size of 32767.